90381524 has 6 divisors (see below), whose sum is σ = 158167674. Its totient is φ = 45190760.

The previous prime is 90381521. The next prime is 90381527. The reversal of 90381524 is 42518309.

It is an interprime number because it is at equal distance from previous prime (90381521) and next prime (90381527).

It can be written as a sum of positive squares in only one way, i.e., 85008400 + 5373124 = 9220^2 + 2318^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (90381521) 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 as a sum of consecutive naturals, namely, 11297687 + ... + 11297694.

It is an arithmetic number, because the mean of its divisors is an integer number (26361279).

Almost surely, 2^90381524 is an apocalyptic number.

It is an amenable number.

90381524 is a deficient number, since it is larger than the sum of its proper divisors (67786150).

90381524 is a wasteful number, since it uses less digits than its factorization.

90381524 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22595385 (or 22595383 counting only the distinct ones).

The product of its (nonzero) digits is 8640, while the sum is 32.

The square root of 90381524 is about 9506.9197956015. The cubic root of 90381524 is about 448.7728276757.

The spelling of 90381524 in words is "ninety million, three hundred eighty-one thousand, five hundred twenty-four".