53390491 has 32 divisors (see below), whose sum is σ = 68935680. Its totient is φ = 40154400.

The previous prime is 53390483. The next prime is 53390501. The reversal of 53390491 is 19409335.

It is not a de Polignac number, because 53390491 - 2³ = 53390483 is a prime.

It is not an unprimeable number, because it can be changed into a prime (53390411) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 407496 + ... + 407626.

It is an arithmetic number, because the mean of its divisors is an integer number (2154240).

Almost surely, 2^53390491 is an apocalyptic number.

53390491 is a deficient number, since it is larger than the sum of its proper divisors (15545189).

53390491 is a wasteful number, since it uses less digits than its factorization.

53390491 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 295.

The product of its (nonzero) digits is 14580, while the sum is 34.

The square root of 53390491 is about 7306.8797034028. The cubic root of 53390491 is about 376.5488321032.

The spelling of 53390491 in words is "fifty-three million, three hundred ninety thousand, four hundred ninety-one".