54199987 has 2 divisors, whose sum is σ = 54199988. Its totient is φ = 54199986.

The previous prime is 54199979. The next prime is 54199993. The reversal of 54199987 is 78999145.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 54199987 - 2³ = 54199979 is a prime.

It is not a weakly prime, because it can be changed into another prime (54199087) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27099993 + 27099994.

It is an arithmetic number, because the mean of its divisors is an integer number (27099994).

Almost surely, 2^54199987 is an apocalyptic number.

54199987 is a deficient number, since it is larger than the sum of its proper divisors (1).

54199987 is an equidigital number, since it uses as much as digits as its factorization.

54199987 is an evil number, because the sum of its binary digits is even.

The product of its digits is 816480, while the sum is 52.

The square root of 54199987 is about 7362.0640448179. The cubic root of 54199987 is about 378.4423472245.

The spelling of 54199987 in words is "fifty-four million, one hundred ninety-nine thousand, nine hundred eighty-seven".