90947642 has 16 divisors (see below), whose sum is σ = 143791200. Its totient is φ = 43023600.

The previous prime is 90947641. The next prime is 90947669. The reversal of 90947642 is 24674909.

It is a self number, because there is not a number n which added to its sum of digits gives 90947642.

It is not an unprimeable number, because it can be changed into a prime (90947641) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 46892 + ... + 48792.

It is an arithmetic number, because the mean of its divisors is an integer number (8986950).

Almost surely, 2^90947642 is an apocalyptic number.

90947642 is a deficient number, since it is larger than the sum of its proper divisors (52843558).

90947642 is a wasteful number, since it uses less digits than its factorization.

90947642 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3181.

The product of its (nonzero) digits is 108864, while the sum is 41.

The square root of 90947642 is about 9536.6473144392. The cubic root of 90947642 is about 449.7078630626.

The spelling of 90947642 in words is "ninety million, nine hundred forty-seven thousand, six hundred forty-two".