90639465 has 64 divisors (see below), whose sum is σ = 172032000. Its totient is φ = 40727232.

The previous prime is 90639463. The next prime is 90639491. The reversal of 90639465 is 56493609.

It is not a de Polignac number, because 90639465 - 2¹ = 90639463 is a prime.

It is not an unprimeable number, because it can be changed into a prime (90639463) 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 63 ways as a sum of consecutive naturals, for example, 406344 + ... + 406566.

It is an arithmetic number, because the mean of its divisors is an integer number (2688000).

Almost surely, 2^90639465 is an apocalyptic number.

It is an amenable number.

90639465 is a deficient number, since it is larger than the sum of its proper divisors (81392535).

90639465 is a wasteful number, since it uses less digits than its factorization.

90639465 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 331 (or 317 counting only the distinct ones).

The product of its (nonzero) digits is 174960, while the sum is 42.

The square root of 90639465 is about 9520.4760910366. The cubic root of 90639465 is about 449.1993417132.

It can be divided in two parts, 9063 and 9465, that added together give a triangular number (18528 = T₁₉₂).

The spelling of 90639465 in words is "ninety million, six hundred thirty-nine thousand, four hundred sixty-five".