31242959669 has 4 divisors (see below), whose sum is σ = 33080780844. Its totient is φ = 29405138496.

The previous prime is 31242959659. The next prime is 31242959707. The reversal of 31242959669 is 96695924213.

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 25644179044 + 5598780625 = 160138^2 + 74825^2 .

It is a cyclic number.

It is not a de Polignac number, because 31242959669 - 2⁸ = 31242959413 is a prime.

It is a super-2 number, since 2×31242959669² (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 (31242959609) 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, 918910562 + ... + 918910595.

It is an arithmetic number, because the mean of its divisors is an integer number (8270195211).

Almost surely, 2^31242959669 is an apocalyptic number.

It is an amenable number.

31242959669 is a deficient number, since it is larger than the sum of its proper divisors (1837821175).

31242959669 is a wasteful number, since it uses less digits than its factorization.

31242959669 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1837821174.

The product of its digits is 6298560, while the sum is 56.

The spelling of 31242959669 in words is "thirty-one billion, two hundred forty-two million, nine hundred fifty-nine thousand, six hundred sixty-nine".