30906292997 has 4 divisors (see below), whose sum is σ = 30906945036. Its totient is φ = 30905640960.

The previous prime is 30906292993. The next prime is 30906292999. The reversal of 30906292997 is 79929260903.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 22288698436 + 8617594561 = 149294^2 + 92831^2 .

It is a cyclic number.

It is not a de Polignac number, because 30906292997 - 2² = 30906292993 is a prime.

It is a super-2 number, since 2×30906292997² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30906292993) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 248828 + ... + 351749.

It is an arithmetic number, because the mean of its divisors is an integer number (7726736259).

Almost surely, 2^30906292997 is an apocalyptic number.

It is an amenable number.

30906292997 is a deficient number, since it is larger than the sum of its proper divisors (652039).

30906292997 is an equidigital number, since it uses as much as digits as its factorization.

30906292997 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 652038.

The product of its (nonzero) digits is 3306744, while the sum is 56.

The spelling of 30906292997 in words is "thirty billion, nine hundred six million, two hundred ninety-two thousand, nine hundred ninety-seven".