1369157789 has 2 divisors, whose sum is σ = 1369157790. Its totient is φ = 1369157788.

The previous prime is 1369157759. The next prime is 1369157807. The reversal of 1369157789 is 9877519631.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1286656900 + 82500889 = 35870^2 + 9083^2 .

It is a cyclic number.

It is not a de Polignac number, because 1369157789 - 2²⁰ = 1368109213 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1369157719) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 684578894 + 684578895.

It is an arithmetic number, because the mean of its divisors is an integer number (684578895).

Almost surely, 2^1369157789 is an apocalyptic number.

It is an amenable number.

1369157789 is a deficient number, since it is larger than the sum of its proper divisors (1).

1369157789 is an equidigital number, since it uses as much as digits as its factorization.

1369157789 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2857680, while the sum is 56.

The square root of 1369157789 is about 37002.1322223463. The cubic root of 1369157789 is about 1110.4129051202.

The spelling of 1369157789 in words is "one billion, three hundred sixty-nine million, one hundred fifty-seven thousand, seven hundred eighty-nine".