1979495501 has 2 divisors, whose sum is σ = 1979495502. Its totient is φ = 1979495500.

The previous prime is 1979495491. The next prime is 1979495579. The reversal of 1979495501 is 1055949791.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1178548900 + 800946601 = 34330^2 + 28301^2 .

It is a cyclic number.

It is not a de Polignac number, because 1979495501 - 2¹⁸ = 1979233357 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1979495501.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1979495701) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 989747750 + 989747751.

It is an arithmetic number, because the mean of its divisors is an integer number (989747751).

Almost surely, 2^1979495501 is an apocalyptic number.

It is an amenable number.

1979495501 is a deficient number, since it is larger than the sum of its proper divisors (1).

1979495501 is an equidigital number, since it uses as much as digits as its factorization.

1979495501 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 510300, while the sum is 50.

The square root of 1979495501 is about 44491.5216754833. The cubic root of 1979495501 is about 1255.6005762403.

The spelling of 1979495501 in words is "one billion, nine hundred seventy-nine million, four hundred ninety-five thousand, five hundred one".