51573979 has 2 divisors, whose sum is σ = 51573980. Its totient is φ = 51573978.

The previous prime is 51573953. The next prime is 51573983. The reversal of 51573979 is 97937515.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 51573979 - 2⁵ = 51573947 is a prime.

It is not a weakly prime, because it can be changed into another prime (51573479) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25786989 + 25786990.

It is an arithmetic number, because the mean of its divisors is an integer number (25786990).

Almost surely, 2^51573979 is an apocalyptic number.

51573979 is a deficient number, since it is larger than the sum of its proper divisors (1).

51573979 is an equidigital number, since it uses as much as digits as its factorization.

51573979 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 297675, while the sum is 46.

The square root of 51573979 is about 7181.5025586572. The cubic root of 51573979 is about 372.2290063894.

The spelling of 51573979 in words is "fifty-one million, five hundred seventy-three thousand, nine hundred seventy-nine".