90136942 has 32 divisors (see below), whose sum is σ = 159090624. Its totient is φ = 37497600.

The previous prime is 90136939. The next prime is 90136951. The reversal of 90136942 is 24963109.

It is a super-2 number, since 2×90136942² = 16249336626222728, which contains 22 as substring.

It is a Smith number, since the sum of its digits (34) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a junction number, because it is equal to n+sod(n) for n = 90136898 and 90136907.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 213892 + ... + 214312.

It is an arithmetic number, because the mean of its divisors is an integer number (4971582).

Almost surely, 2^90136942 is an apocalyptic number.

90136942 is a deficient number, since it is larger than the sum of its proper divisors (68953682).

90136942 is a wasteful number, since it uses less digits than its factorization.

90136942 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 844.

The product of its (nonzero) digits is 11664, while the sum is 34.

The square root of 90136942 is about 9494.0477142260. The cubic root of 90136942 is about 448.3676530007.

The spelling of 90136942 in words is "ninety million, one hundred thirty-six thousand, nine hundred forty-two".