53998407 has 10 divisors (see below), whose sum is σ = 80664408. Its totient is φ = 35998884.

The previous prime is 53998403. The next prime is 53998421. The reversal of 53998407 is 70489935.

It is not a de Polignac number, because 53998407 - 2² = 53998403 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (53998403) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 333243 + ... + 333404.

Almost surely, 2^53998407 is an apocalyptic number.

53998407 is a deficient number, since it is larger than the sum of its proper divisors (26666001).

53998407 is an equidigital number, since it uses as much as digits as its factorization.

53998407 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 666659 (or 666650 counting only the distinct ones).

The product of its (nonzero) digits is 272160, while the sum is 45.

The square root of 53998407 is about 7348.3608376290. The cubic root of 53998407 is about 377.9725981648.

The spelling of 53998407 in words is "fifty-three million, nine hundred ninety-eight thousand, four hundred seven".