1979522801 has 2 divisors, whose sum is σ = 1979522802. Its totient is φ = 1979522800.

The previous prime is 1979522749. The next prime is 1979522827. The reversal of 1979522801 is 1082259791.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1603201600 + 376321201 = 40040^2 + 19399^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1979522801 is a prime.

It is not a weakly prime, because it can be changed into another prime (1979527801) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 989761400 + 989761401.

It is an arithmetic number, because the mean of its divisors is an integer number (989761401).

Almost surely, 2^1979522801 is an apocalyptic number.

It is an amenable number.

1979522801 is a deficient number, since it is larger than the sum of its proper divisors (1).

1979522801 is an equidigital number, since it uses as much as digits as its factorization.

1979522801 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 90720, while the sum is 44.

The square root of 1979522801 is about 44491.8284744514. The cubic root of 1979522801 is about 1255.6063483740.

The spelling of 1979522801 in words is "one billion, nine hundred seventy-nine million, five hundred twenty-two thousand, eight hundred one".