1979653523 has 2 divisors, whose sum is σ = 1979653524. Its totient is φ = 1979653522.

The previous prime is 1979653517. The next prime is 1979653537. The reversal of 1979653523 is 3253569791.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1979653523 is a prime.

It is a super-2 number, since 2×1979653523² = 7838056142252623058, which contains 22 as substring.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (1979653223) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 989826761 + 989826762.

It is an arithmetic number, because the mean of its divisors is an integer number (989826762).

Almost surely, 2^1979653523 is an apocalyptic number.

1979653523 is a deficient number, since it is larger than the sum of its proper divisors (1).

1979653523 is an equidigital number, since it uses as much as digits as its factorization.

1979653523 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1530900, while the sum is 50.

The square root of 1979653523 is about 44493.2975064784. The cubic root of 1979653523 is about 1255.6339866446.

The spelling of 1979653523 in words is "one billion, nine hundred seventy-nine million, six hundred fifty-three thousand, five hundred twenty-three".