427721093 has 2 divisors, whose sum is σ = 427721094. Its totient is φ = 427721092.

The previous prime is 427721083. The next prime is 427721113. The reversal of 427721093 is 390127724.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 328080769 + 99640324 = 18113^2 + 9982^2 .

It is a cyclic number.

It is not a de Polignac number, because 427721093 - 2²⁴ = 410943877 is a prime.

It is a super-2 number, since 2×427721093² = 365890666794229298, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (427721023) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 213860546 + 213860547.

It is an arithmetic number, because the mean of its divisors is an integer number (213860547).

Almost surely, 2^427721093 is an apocalyptic number.

It is an amenable number.

427721093 is a deficient number, since it is larger than the sum of its proper divisors (1).

427721093 is an equidigital number, since it uses as much as digits as its factorization.

427721093 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 21168, while the sum is 35.

The square root of 427721093 is about 20681.4190277166. The cubic root of 427721093 is about 753.4484711679.

The spelling of 427721093 in words is "four hundred twenty-seven million, seven hundred twenty-one thousand, ninety-three".