53491637 has 4 divisors (see below), whose sum is σ = 53713836. Its totient is φ = 53269440.

The previous prime is 53491621. The next prime is 53491643. The reversal of 53491637 is 73619435.

It is a happy number.

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

It can be written as a sum of positive squares in 2 ways, for example, as 26357956 + 27133681 = 5134^2 + 5209^2 .

It is a cyclic number.

It is not a de Polignac number, because 53491637 - 2⁴ = 53491621 is a prime.

It is a super-2 number, since 2×53491637² = 5722710457879538, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 53491637.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (53491667) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 110738 + ... + 111219.

It is an arithmetic number, because the mean of its divisors is an integer number (13428459).

Almost surely, 2^53491637 is an apocalyptic number.

It is an amenable number.

53491637 is a deficient number, since it is larger than the sum of its proper divisors (222199).

53491637 is a wasteful number, since it uses less digits than its factorization.

53491637 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 222198.

The product of its digits is 68040, while the sum is 38.

The square root of 53491637 is about 7313.7977139103. The cubic root of 53491637 is about 376.7864673183.

The spelling of 53491637 in words is "fifty-three million, four hundred ninety-one thousand, six hundred thirty-seven".