189157769 has 2 divisors, whose sum is σ = 189157770. Its totient is φ = 189157768.

The previous prime is 189157739. The next prime is 189157777. The reversal of 189157769 is 967751981.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 186049600 + 3108169 = 13640^2 + 1763^2 .

It is a cyclic number.

It is not a de Polignac number, because 189157769 - 2⁸ = 189157513 is a prime.

It is a super-2 number, since 2×189157769² = 71561323146114722, 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 189157769.

It is not a weakly prime, because it can be changed into another prime (189157739) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 94578884 + 94578885.

It is an arithmetic number, because the mean of its divisors is an integer number (94578885).

Almost surely, 2^189157769 is an apocalyptic number.

It is an amenable number.

189157769 is a deficient number, since it is larger than the sum of its proper divisors (1).

189157769 is an equidigital number, since it uses as much as digits as its factorization.

189157769 is an evil number, because the sum of its binary digits is even.

The product of its digits is 952560, while the sum is 53.

The square root of 189157769 is about 13753.4638909622. The cubic root of 189157769 is about 574.0389936158.

The spelling of 189157769 in words is "one hundred eighty-nine million, one hundred fifty-seven thousand, seven hundred sixty-nine".