51989497 has 8 divisors (see below), whose sum is σ = 59493056. Its totient is φ = 44505072.

The previous prime is 51989471. The next prime is 51989503. The reversal of 51989497 is 79498915.

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 51989497 - 2⁷ = 51989369 is a prime.

It is not an unprimeable number, because it can be changed into a prime (51981497) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1618 + ... + 10324.

It is an arithmetic number, because the mean of its divisors is an integer number (7436632).

Almost surely, 2^51989497 is an apocalyptic number.

It is an amenable number.

51989497 is a deficient number, since it is larger than the sum of its proper divisors (7503559).

51989497 is an equidigital number, since it uses as much as digits as its factorization.

51989497 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9567.

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

The square root of 51989497 is about 7210.3742621309. The cubic root of 51989497 is about 373.2259841405.

The spelling of 51989497 in words is "fifty-one million, nine hundred eighty-nine thousand, four hundred ninety-seven".