51698959 has 12 divisors (see below), whose sum is σ = 56327400. Its totient is φ = 47427744.

The previous prime is 51698951. The next prime is 51698987. The reversal of 51698959 is 95989615.

It is not a de Polignac number, because 51698959 - 2³ = 51698951 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51698951) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 29397 + ... + 31105.

It is an arithmetic number, because the mean of its divisors is an integer number (4693950).

Almost surely, 2^51698959 is an apocalyptic number.

51698959 is a deficient number, since it is larger than the sum of its proper divisors (4628441).

51698959 is a wasteful number, since it uses less digits than its factorization.

51698959 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1914 (or 1901 counting only the distinct ones).

The product of its digits is 874800, while the sum is 52.

The square root of 51698959 is about 7190.1988150537. The cubic root of 51698959 is about 372.5294398905.

The spelling of 51698959 in words is "fifty-one million, six hundred ninety-eight thousand, nine hundred fifty-nine".