53623809 has 8 divisors (see below), whose sum is σ = 79442720. Its totient is φ = 35749188.

The previous prime is 53623807. The next prime is 53623847. The reversal of 53623809 is 90832635.

It is not a de Polignac number, because 53623809 - 2¹ = 53623807 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (53623807) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 993007 + ... + 993060.

It is an arithmetic number, because the mean of its divisors is an integer number (9930340).

Almost surely, 2^53623809 is an apocalyptic number.

It is an amenable number.

53623809 is a deficient number, since it is larger than the sum of its proper divisors (25818911).

53623809 is a wasteful number, since it uses less digits than its factorization.

53623809 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1986076 (or 1986070 counting only the distinct ones).

The product of its (nonzero) digits is 38880, while the sum is 36.

The square root of 53623809 is about 7322.8279373477. The cubic root of 53623809 is about 377.0965448223.

The spelling of 53623809 in words is "fifty-three million, six hundred twenty-three thousand, eight hundred nine".