90972743 has 2 divisors, whose sum is σ = 90972744. Its totient is φ = 90972742.

The previous prime is 90972737. The next prime is 90972757. The reversal of 90972743 is 34727909.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 90972743 - 2²⁰ = 89924167 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 90972743.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (90972143) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45486371 + 45486372.

It is an arithmetic number, because the mean of its divisors is an integer number (45486372).

Almost surely, 2^90972743 is an apocalyptic number.

90972743 is a deficient number, since it is larger than the sum of its proper divisors (1).

90972743 is an equidigital number, since it uses as much as digits as its factorization.

90972743 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 95256, while the sum is 41.

The square root of 90972743 is about 9537.9632521834. The cubic root of 90972743 is about 449.7492314753.

The spelling of 90972743 in words is "ninety million, nine hundred seventy-two thousand, seven hundred forty-three".