31438892911 has 2 divisors, whose sum is σ = 31438892912. Its totient is φ = 31438892910.

The previous prime is 31438892899. The next prime is 31438892951. The reversal of 31438892911 is 11929883413.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 31438892911 - 2⁵ = 31438892879 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (31438892951) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15719446455 + 15719446456.

It is an arithmetic number, because the mean of its divisors is an integer number (15719446456).

Almost surely, 2^31438892911 is an apocalyptic number.

31438892911 is a deficient number, since it is larger than the sum of its proper divisors (1).

31438892911 is an equidigital number, since it uses as much as digits as its factorization.

31438892911 is an evil number, because the sum of its binary digits is even.

The product of its digits is 373248, while the sum is 49.

The spelling of 31438892911 in words is "thirty-one billion, four hundred thirty-eight million, eight hundred ninety-two thousand, nine hundred eleven".