53909506 has 24 divisors (see below), whose sum is σ = 96368076. Its totient is φ = 22538880.

The previous prime is 53909503. The next prime is 53909509. The reversal of 53909506 is 60590935.

It is an interprime number because it is at equal distance from previous prime (53909503) and next prime (53909509).

It can be written as a sum of positive squares in 2 ways, for example, as 47734281 + 6175225 = 6909^2 + 2485^2 .

It is a Smith number, since the sum of its digits (37) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (53909503) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2691 + ... + 10726.

Almost surely, 2^53909506 is an apocalyptic number.

53909506 is a deficient number, since it is larger than the sum of its proper divisors (42458570).

53909506 is a wasteful number, since it uses less digits than its factorization.

53909506 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13474 (or 13467 counting only the distinct ones).

The product of its (nonzero) digits is 36450, while the sum is 37.

The square root of 53909506 is about 7342.3093097472. The cubic root of 53909506 is about 377.7650574789.

The spelling of 53909506 in words is "fifty-three million, nine hundred nine thousand, five hundred six".