136944969 has 16 divisors (see below), whose sum is σ = 209620992. Its totient is φ = 77900688.

The previous prime is 136944947. The next prime is 136944971. The reversal of 136944969 is 969449631.

It is not a de Polignac number, because 136944969 - 2⁸ = 136944713 is a prime.

It is a super-2 number, since 2×136944969² = 37507849068821922, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (136944919) 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, 9939 + ... + 19304.

It is an arithmetic number, because the mean of its divisors is an integer number (13101312).

Almost surely, 2^136944969 is an apocalyptic number.

It is an amenable number.

136944969 is a deficient number, since it is larger than the sum of its proper divisors (72676023).

136944969 is a wasteful number, since it uses less digits than its factorization.

136944969 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29476.

The product of its digits is 1259712, while the sum is 51.

The square root of 136944969 is about 11702.3488667874. The cubic root of 136944969 is about 515.4446394057. Note that the first 3 decimals are identical.

The spelling of 136944969 in words is "one hundred thirty-six million, nine hundred forty-four thousand, nine hundred sixty-nine".