90742719971 has 2 divisors, whose sum is σ = 90742719972. Its totient is φ = 90742719970.

The previous prime is 90742719937. The next prime is 90742719983. The reversal of 90742719971 is 17991724709.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 90742719971 - 2¹⁰ = 90742718947 is a prime.

It is not a weakly prime, because it can be changed into another prime (90742719931) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45371359985 + 45371359986.

It is an arithmetic number, because the mean of its divisors is an integer number (45371359986).

Almost surely, 2^90742719971 is an apocalyptic number.

90742719971 is a deficient number, since it is larger than the sum of its proper divisors (1).

90742719971 is an equidigital number, since it uses as much as digits as its factorization.

90742719971 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2000376, while the sum is 56.

The spelling of 90742719971 in words is "ninety billion, seven hundred forty-two million, seven hundred nineteen thousand, nine hundred seventy-one".