1069891357 has 2 divisors, whose sum is σ = 1069891358. Its totient is φ = 1069891356.

The previous prime is 1069891327. The next prime is 1069891363. The reversal of 1069891357 is 7531989601.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 974750841 + 95140516 = 31221^2 + 9754^2 .

It is an emirp because it is prime and its reverse (7531989601) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1069891357 is a prime.

It is a super-2 number, since 2×1069891357² = 2289335031566602898, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1069891357.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1069891327) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 534945678 + 534945679.

It is an arithmetic number, because the mean of its divisors is an integer number (534945679).

Almost surely, 2^1069891357 is an apocalyptic number.

It is an amenable number.

1069891357 is a deficient number, since it is larger than the sum of its proper divisors (1).

1069891357 is an equidigital number, since it uses as much as digits as its factorization.

1069891357 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 408240, while the sum is 49.

The square root of 1069891357 is about 32709.1937687250. The cubic root of 1069891357 is about 1022.7745034480.

The spelling of 1069891357 in words is "one billion, sixty-nine million, eight hundred ninety-one thousand, three hundred fifty-seven".