51989579 has 2 divisors, whose sum is σ = 51989580. Its totient is φ = 51989578.

The previous prime is 51989563. The next prime is 51989593. The reversal of 51989579 is 97598915.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 51989579 - 2⁴ = 51989563 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 51989579.

It is not a weakly prime, because it can be changed into another prime (51989549) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25994789 + 25994790.

It is an arithmetic number, because the mean of its divisors is an integer number (25994790).

Almost surely, 2^51989579 is an apocalyptic number.

51989579 is a deficient number, since it is larger than the sum of its proper divisors (1).

51989579 is an equidigital number, since it uses as much as digits as its factorization.

51989579 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1020600, while the sum is 53.

The square root of 51989579 is about 7210.3799483800. The cubic root of 51989579 is about 373.2261803629.

The spelling of 51989579 in words is "fifty-one million, nine hundred eighty-nine thousand, five hundred seventy-nine".