136339691 has 16 divisors (see below), whose sum is σ = 142417440. Its totient is φ = 130440960.

The previous prime is 136339681. The next prime is 136339703. The reversal of 136339691 is 196933631.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 136339691 - 2¹⁸ = 136077547 is a prime.

It is a super-2 number, since 2×136339691² = 37177022683950962, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (136339631) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 506705 + ... + 506973.

It is an arithmetic number, because the mean of its divisors is an integer number (8901090).

Almost surely, 2^136339691 is an apocalyptic number.

136339691 is a deficient number, since it is larger than the sum of its proper divisors (6077749).

136339691 is a wasteful number, since it uses less digits than its factorization.

136339691 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 526.

The product of its digits is 78732, while the sum is 41.

The square root of 136339691 is about 11676.4588381923. The cubic root of 136339691 is about 514.6841196101.

The spelling of 136339691 in words is "one hundred thirty-six million, three hundred thirty-nine thousand, six hundred ninety-one".