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308927904421 is a prime number
BaseRepresentation
bin1000111111011011000…
…10011011101010100101
31002112101201100120012211
410133231202123222211
520030141020420141
6353530341043421
731214343601243
oct4375542335245
91075351316184
10308927904421
1110a019826004
124ba573b6571
13231936885a6
1410d48b4b793
158081398d81
hex47ed89baa5

308927904421 has 2 divisors, whose sum is σ = 308927904422. Its totient is φ = 308927904420.

The previous prime is 308927904419. The next prime is 308927904521. The reversal of 308927904421 is 124409729803.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 307836328900 + 1091575521 = 554830^2 + 33039^2 .

It is a cyclic number.

It is not a de Polignac number, because 308927904421 - 21 = 308927904419 is a prime.

It is a super-2 number, since 2×3089279044212 (a number of 24 digits) contains 22 as substring.

Together with 308927904419, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (308927904521) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 154463952210 + 154463952211.

It is an arithmetic number, because the mean of its divisors is an integer number (154463952211).

Almost surely, 2308927904421 is an apocalyptic number.

It is an amenable number.

308927904421 is a deficient number, since it is larger than the sum of its proper divisors (1).

308927904421 is an equidigital number, since it uses as much as digits as its factorization.

308927904421 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 870912, while the sum is 49.

The spelling of 308927904421 in words is "three hundred eight billion, nine hundred twenty-seven million, nine hundred four thousand, four hundred twenty-one".