31438954793 has 2 divisors, whose sum is σ = 31438954794. Its totient is φ = 31438954792.

The previous prime is 31438954741. The next prime is 31438954829. The reversal of 31438954793 is 39745983413.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 27919736464 + 3519218329 = 167092^2 + 59323^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-31438954793 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (31438954733) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15719477396 + 15719477397.

It is an arithmetic number, because the mean of its divisors is an integer number (15719477397).

Almost surely, 2^31438954793 is an apocalyptic number.

It is an amenable number.

31438954793 is a deficient number, since it is larger than the sum of its proper divisors (1).

31438954793 is an equidigital number, since it uses as much as digits as its factorization.

31438954793 is an evil number, because the sum of its binary digits is even.

The product of its digits is 9797760, while the sum is 56.

The spelling of 31438954793 in words is "thirty-one billion, four hundred thirty-eight million, nine hundred fifty-four thousand, seven hundred ninety-three".