51989695 has 8 divisors (see below), whose sum is σ = 62971344. Its totient is φ = 41202624.

The previous prime is 51989687. The next prime is 51989701. The reversal of 51989695 is 59698915.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 51989695 - 2³ = 51989687 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 48054 + ... + 49123.

It is an arithmetic number, because the mean of its divisors is an integer number (7871418).

Almost surely, 2^51989695 is an apocalyptic number.

51989695 is a deficient number, since it is larger than the sum of its proper divisors (10981649).

51989695 is a wasteful number, since it uses less digits than its factorization.

51989695 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 97289.

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

The square root of 51989695 is about 7210.3879923344. The cubic root of 51989695 is about 373.2264579455.

The spelling of 51989695 in words is "fifty-one million, nine hundred eighty-nine thousand, six hundred ninety-five".