53998999 has 2 divisors, whose sum is σ = 53999000. Its totient is φ = 53998998.

The previous prime is 53998991. The next prime is 53999017. The reversal of 53998999 is 99989935.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 53998999 - 2³ = 53998991 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (53998991) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 26999499 + 26999500.

It is an arithmetic number, because the mean of its divisors is an integer number (26999500).

Almost surely, 2^53998999 is an apocalyptic number.

53998999 is a deficient number, since it is larger than the sum of its proper divisors (1).

53998999 is an equidigital number, since it uses as much as digits as its factorization.

53998999 is an evil number, because the sum of its binary digits is even.

The product of its digits is 7085880, while the sum is 61.

The square root of 53998999 is about 7348.4011186108. The cubic root of 53998999 is about 377.9739794337.

The spelling of 53998999 in words is "fifty-three million, nine hundred ninety-eight thousand, nine hundred ninety-nine".