90319451 has 4 divisors (see below), whose sum is σ = 90645792. Its totient is φ = 89993112.

The previous prime is 90319403. The next prime is 90319457. The reversal of 90319451 is 15491309.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 90319451 - 2⁶ = 90319387 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (90319457) 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 3 ways as a sum of consecutive naturals, for example, 162755 + ... + 163308.

It is an arithmetic number, because the mean of its divisors is an integer number (22661448).

Almost surely, 2^90319451 is an apocalyptic number.

90319451 is a deficient number, since it is larger than the sum of its proper divisors (326341).

90319451 is a wasteful number, since it uses less digits than its factorization.

90319451 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 326340.

The product of its (nonzero) digits is 4860, while the sum is 32.

The square root of 90319451 is about 9503.6546128318. The cubic root of 90319451 is about 448.6700667936.

The spelling of 90319451 in words is "ninety million, three hundred nineteen thousand, four hundred fifty-one".