136949631 has 32 divisors (see below), whose sum is σ = 225673728. Its totient is φ = 71936640.

The previous prime is 136949573. The next prime is 136949633.

136949631 is nontrivially palindromic in base 10.

It is not a de Polignac number, because 136949631 - 2¹¹ = 136947583 is a prime.

It is a super-2 number, since 2×136949631² = 37510402862072322, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (136949633) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 74716 + ... + 76526.

It is an arithmetic number, because the mean of its divisors is an integer number (7052304).

Almost surely, 2^136949631 is an apocalyptic number.

136949631 is a deficient number, since it is larger than the sum of its proper divisors (88724097).

136949631 is a wasteful number, since it uses less digits than its factorization.

136949631 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2111.

The product of its digits is 104976, while the sum is 42.

The square root of 136949631 is about 11702.5480558723. The cubic root of 136949631 is about 515.4504884112.

The spelling of 136949631 in words is "one hundred thirty-six million, nine hundred forty-nine thousand, six hundred thirty-one".