355479991 has 2 divisors, whose sum is σ = 355479992. Its totient is φ = 355479990.

The previous prime is 355479989. The next prime is 355480009. The reversal of 355479991 is 199974553.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 355479991 - 2¹ = 355479989 is a prime.

Together with 355479989, 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 (355479961) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 177739995 + 177739996.

It is an arithmetic number, because the mean of its divisors is an integer number (177739996).

Almost surely, 2^355479991 is an apocalyptic number.

355479991 is a deficient number, since it is larger than the sum of its proper divisors (1).

355479991 is an equidigital number, since it uses as much as digits as its factorization.

355479991 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1530900, while the sum is 52.

The square root of 355479991 is about 18854.1770173084. The cubic root of 355479991 is about 708.3888554894.

The spelling of 355479991 in words is "three hundred fifty-five million, four hundred seventy-nine thousand, nine hundred ninety-one".