655370939 has 2 divisors, whose sum is σ = 655370940. Its totient is φ = 655370938.

The previous prime is 655370929. The next prime is 655371001. The reversal of 655370939 is 939073556.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 655370939 - 2⁴ = 655370923 is a prime.

It is a super-2 number, since 2×655370939² = 859022135371483442, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 655370893 and 655370902.

It is not a weakly prime, because it can be changed into another prime (655370929) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 327685469 + 327685470.

It is an arithmetic number, because the mean of its divisors is an integer number (327685470).

Almost surely, 2^655370939 is an apocalyptic number.

655370939 is a deficient number, since it is larger than the sum of its proper divisors (1).

655370939 is an equidigital number, since it uses as much as digits as its factorization.

655370939 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 765450, while the sum is 47.

The square root of 655370939 is about 25600.2136514522. The cubic root of 655370939 is about 868.6184701309.

The spelling of 655370939 in words is "six hundred fifty-five million, three hundred seventy thousand, nine hundred thirty-nine".