1939422557 has 2 divisors, whose sum is σ = 1939422558. Its totient is φ = 1939422556.

The previous prime is 1939422521. The next prime is 1939422607. The reversal of 1939422557 is 7552249391.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1817231641 + 122190916 = 42629^2 + 11054^2 .

It is a cyclic number.

It is not a de Polignac number, because 1939422557 - 2¹⁴ = 1939406173 is a prime.

It is a super-2 number, since 2×1939422557² = 7522719709200836498, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1939422517) 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, 969711278 + 969711279.

It is an arithmetic number, because the mean of its divisors is an integer number (969711279).

Almost surely, 2^1939422557 is an apocalyptic number.

It is an amenable number.

1939422557 is a deficient number, since it is larger than the sum of its proper divisors (1).

1939422557 is an equidigital number, since it uses as much as digits as its factorization.

1939422557 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 680400, while the sum is 47.

The square root of 1939422557 is about 44038.8755192500. The cubic root of 1939422557 is about 1247.0699493691.

The spelling of 1939422557 in words is "one billion, nine hundred thirty-nine million, four hundred twenty-two thousand, five hundred fifty-seven".