90731112869 has 2 divisors, whose sum is σ = 90731112870. Its totient is φ = 90731112868.

The previous prime is 90731112803. The next prime is 90731112881. The reversal of 90731112869 is 96821113709.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 59309296225 + 31421816644 = 243535^2 + 177262^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-90731112869 is a prime.

It is a super-2 number, since 2×90731112869² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (90731111869) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45365556434 + 45365556435.

It is an arithmetic number, because the mean of its divisors is an integer number (45365556435).

Almost surely, 2^90731112869 is an apocalyptic number.

It is an amenable number.

90731112869 is a deficient number, since it is larger than the sum of its proper divisors (1).

90731112869 is an equidigital number, since it uses as much as digits as its factorization.

90731112869 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 163296, while the sum is 47.

The spelling of 90731112869 in words is "ninety billion, seven hundred thirty-one million, one hundred twelve thousand, eight hundred sixty-nine".