31113009077 has 2 divisors, whose sum is σ = 31113009078. Its totient is φ = 31113009076.

The previous prime is 31113009001. The next prime is 31113009097. The reversal of 31113009077 is 77090031113.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 16336418596 + 14776590481 = 127814^2 + 121559^2 .

It is a cyclic number.

It is not a de Polignac number, because 31113009077 - 2²⁰ = 31111960501 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (31113009097) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15556504538 + 15556504539.

It is an arithmetic number, because the mean of its divisors is an integer number (15556504539).

Almost surely, 2^31113009077 is an apocalyptic number.

It is an amenable number.

31113009077 is a deficient number, since it is larger than the sum of its proper divisors (1).

31113009077 is an equidigital number, since it uses as much as digits as its factorization.

31113009077 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3969, while the sum is 32.

The spelling of 31113009077 in words is "thirty-one billion, one hundred thirteen million, nine thousand, seventy-seven".