54680639 has 4 divisors (see below), whose sum is σ = 58886856. Its totient is φ = 50474424.

The previous prime is 54680617. The next prime is 54680641. The reversal of 54680639 is 93608645.

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

It is not a de Polignac number, because 54680639 - 2²⁰ = 53632063 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 54680596 and 54680605.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (54680239) 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, 2103089 + ... + 2103114.

It is an arithmetic number, because the mean of its divisors is an integer number (14721714).

Almost surely, 2^54680639 is an apocalyptic number.

54680639 is a deficient number, since it is larger than the sum of its proper divisors (4206217).

54680639 is a wasteful number, since it uses less digits than its factorization.

54680639 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4206216.

The product of its (nonzero) digits is 155520, while the sum is 41.

The square root of 54680639 is about 7394.6358260566. The cubic root of 54680639 is about 379.5577472686.

The spelling of 54680639 in words is "fifty-four million, six hundred eighty thousand, six hundred thirty-nine".