1057396969 has 2 divisors, whose sum is σ = 1057396970. Its totient is φ = 1057396968.

The previous prime is 1057396919. The next prime is 1057396973. The reversal of 1057396969 is 9696937501.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 935625744 + 121771225 = 30588^2 + 11035^2 .

It is a cyclic number.

It is not a de Polignac number, because 1057396969 - 2²³ = 1049008361 is a prime.

It is a super-2 number, since 2×1057396969² = 2236176700100773922, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1057396919) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 528698484 + 528698485.

It is an arithmetic number, because the mean of its divisors is an integer number (528698485).

Almost surely, 2^1057396969 is an apocalyptic number.

It is an amenable number.

1057396969 is a deficient number, since it is larger than the sum of its proper divisors (1).

1057396969 is an equidigital number, since it uses as much as digits as its factorization.

1057396969 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2755620, while the sum is 55.

The square root of 1057396969 is about 32517.6408892158. The cubic root of 1057396969 is about 1018.7775207590. Note that the first 3 decimals are identical.

The spelling of 1057396969 in words is "one billion, fifty-seven million, three hundred ninety-six thousand, nine hundred sixty-nine".