51984913 has 2 divisors, whose sum is σ = 51984914. Its totient is φ = 51984912.

The previous prime is 51984901. The next prime is 51984917. The reversal of 51984913 is 31948915.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 48052624 + 3932289 = 6932^2 + 1983^2 .

It is a cyclic number.

It is not a de Polignac number, because 51984913 - 2²⁵ = 18430481 is a prime.

It is not a weakly prime, because it can be changed into another prime (51984917) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25992456 + 25992457.

It is an arithmetic number, because the mean of its divisors is an integer number (25992457).

Almost surely, 2^51984913 is an apocalyptic number.

It is an amenable number.

51984913 is a deficient number, since it is larger than the sum of its proper divisors (1).

51984913 is an equidigital number, since it uses as much as digits as its factorization.

51984913 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 38880, while the sum is 40.

The square root of 51984913 is about 7210.0563798073. The cubic root of 51984913 is about 373.2150145005.

The spelling of 51984913 in words is "fifty-one million, nine hundred eighty-four thousand, nine hundred thirteen".