136697089 has 2 divisors, whose sum is σ = 136697090. Its totient is φ = 136697088.

The previous prime is 136697069. The next prime is 136697107. The reversal of 136697089 is 980796631.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 134954689 + 1742400 = 11617^2 + 1320^2 .

It is a cyclic number.

It is not a de Polignac number, because 136697089 - 2⁷ = 136696961 is a prime.

It is not a weakly prime, because it can be changed into another prime (136697069) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 68348544 + 68348545.

It is an arithmetic number, because the mean of its divisors is an integer number (68348545).

Almost surely, 2^136697089 is an apocalyptic number.

It is an amenable number.

136697089 is a deficient number, since it is larger than the sum of its proper divisors (1).

136697089 is an equidigital number, since it uses as much as digits as its factorization.

136697089 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 489888, while the sum is 49.

The square root of 136697089 is about 11691.7530336558. The cubic root of 136697089 is about 515.1334545901.

It can be divided in two parts, 136 and 697089, that added together give a square (697225 = 835²).

The spelling of 136697089 in words is "one hundred thirty-six million, six hundred ninety-seven thousand, eighty-nine".