53687139 has 32 divisors (see below), whose sum is σ = 83752704. Its totient is φ = 30228480.

The previous prime is 53687107. The next prime is 53687171. The reversal of 53687139 is 93178635.

It is an interprime number because it is at equal distance from previous prime (53687107) and next prime (53687171).

It is not a de Polignac number, because 53687139 - 2⁵ = 53687107 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 53687139.

It is not an unprimeable number, because it can be changed into a prime (53687189) 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, 45987 + ... + 47139.

It is an arithmetic number, because the mean of its divisors is an integer number (2617272).

Almost surely, 2^53687139 is an apocalyptic number.

53687139 is a deficient number, since it is larger than the sum of its proper divisors (30065565).

53687139 is a wasteful number, since it uses less digits than its factorization.

53687139 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1267.

The product of its digits is 136080, while the sum is 42.

The square root of 53687139 is about 7327.1508105129. The cubic root of 53687139 is about 377.2449374200.

The spelling of 53687139 in words is "fifty-three million, six hundred eighty-seven thousand, one hundred thirty-nine".