54638687 has 2 divisors, whose sum is σ = 54638688. Its totient is φ = 54638686.

The previous prime is 54638671. The next prime is 54638693. The reversal of 54638687 is 78683645.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 54638687 - 2⁴ = 54638671 is a prime.

It is a super-2 number, since 2×54638687² = 5970772234167938, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (54638627) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27319343 + 27319344.

It is an arithmetic number, because the mean of its divisors is an integer number (27319344).

Almost surely, 2^54638687 is an apocalyptic number.

54638687 is a deficient number, since it is larger than the sum of its proper divisors (1).

54638687 is an equidigital number, since it uses as much as digits as its factorization.

54638687 is an evil number, because the sum of its binary digits is even.

The product of its digits is 967680, while the sum is 47.

The square root of 54638687 is about 7391.7986309152. The cubic root of 54638687 is about 379.4606545204.

The spelling of 54638687 in words is "fifty-four million, six hundred thirty-eight thousand, six hundred eighty-seven".