90165542 has 4 divisors (see below), whose sum is σ = 135248316. Its totient is φ = 45082770.

The previous prime is 90165541. The next prime is 90165619. The reversal of 90165542 is 24556109.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 24556109 = 17 ⋅1444477.

It is a junction number, because it is equal to n+sod(n) for n = 90165499 and 90165508.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (90165541) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 22541384 + ... + 22541387.

It is an arithmetic number, because the mean of its divisors is an integer number (33812079).

Almost surely, 2^90165542 is an apocalyptic number.

90165542 is a deficient number, since it is larger than the sum of its proper divisors (45082774).

90165542 is a wasteful number, since it uses less digits than its factorization.

90165542 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45082773.

The product of its (nonzero) digits is 10800, while the sum is 32.

The square root of 90165542 is about 9495.5538016484. The cubic root of 90165542 is about 448.4150695891.

The spelling of 90165542 in words is "ninety million, one hundred sixty-five thousand, five hundred forty-two".