55738987 has 6 divisors (see below), whose sum is σ = 56813372. Its totient is φ = 54684552.

The previous prime is 55738981. The next prime is 55738993. The reversal of 55738987 is 78983755.

It is an interprime number because it is at equal distance from previous prime (55738981) and next prime (55738993).

It is not a de Polignac number, because 55738987 - 2²³ = 47350379 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (55738981) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 7113 + ... + 12730.

Almost surely, 2^55738987 is an apocalyptic number.

55738987 is a deficient number, since it is larger than the sum of its proper divisors (1074385).

55738987 is an equidigital number, since it uses as much as digits as its factorization.

55738987 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19949 (or 19896 counting only the distinct ones).

The product of its digits is 2116800, while the sum is 52.

The square root of 55738987 is about 7465.8547400817. The cubic root of 55738987 is about 381.9909060087.

The spelling of 55738987 in words is "fifty-five million, seven hundred thirty-eight thousand, nine hundred eighty-seven".