90561502 has 4 divisors (see below), whose sum is σ = 135842256. Its totient is φ = 45280750.

The previous prime is 90561487. The next prime is 90561503. The reversal of 90561502 is 20516509.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 20516509 = 13 ⋅1578193.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (90561503) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 22640374 + ... + 22640377.

It is an arithmetic number, because the mean of its divisors is an integer number (33960564).

Almost surely, 2^90561502 is an apocalyptic number.

90561502 is a deficient number, since it is larger than the sum of its proper divisors (45280754).

90561502 is a wasteful number, since it uses less digits than its factorization.

90561502 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45280753.

The product of its (nonzero) digits is 2700, while the sum is 28.

The square root of 90561502 is about 9516.3807195803. The cubic root of 90561502 is about 449.0705127162.

The spelling of 90561502 in words is "ninety million, five hundred sixty-one thousand, five hundred two".