90972742 has 16 divisors (see below), whose sum is σ = 156858912. Its totient is φ = 38761920.

The previous prime is 90972737. The next prime is 90972743. The reversal of 90972742 is 24727909.

It is a junction number, because it is equal to n+sod(n) for n = 90972695 and 90972704.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (90972743) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 16359 + ... + 21202.

It is an arithmetic number, because the mean of its divisors is an integer number (9803682).

Almost surely, 2^90972742 is an apocalyptic number.

90972742 is a deficient number, since it is larger than the sum of its proper divisors (65886170).

90972742 is a wasteful number, since it uses less digits than its factorization.

90972742 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37743.

The product of its (nonzero) digits is 63504, while the sum is 40.

The square root of 90972742 is about 9537.9631997613. The cubic root of 90972742 is about 449.7492298273.

The spelling of 90972742 in words is "ninety million, nine hundred seventy-two thousand, seven hundred forty-two".