136840634 has 36 divisors (see below), whose sum is σ = 246893562. Its totient is φ = 56715120.

The previous prime is 136840631. The next prime is 136840661. The reversal of 136840634 is 436048631.

It can be written as a sum of positive squares in only one way, i.e., 79156609 + 57684025 = 8897^2 + 7595^2 .

It is a super-2 number, since 2×136840634² = 37450718227043912, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 136840594 and 136840603.

It is not an unprimeable number, because it can be changed into a prime (136840631) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 93452 + ... + 94904.

Almost surely, 2^136840634 is an apocalyptic number.

136840634 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

136840634 is a deficient number, since it is larger than the sum of its proper divisors (110052928).

136840634 is a wasteful number, since it uses less digits than its factorization.

136840634 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1531 (or 1493 counting only the distinct ones).

The product of its (nonzero) digits is 41472, while the sum is 35.

The square root of 136840634 is about 11697.8901516470. The cubic root of 136840634 is about 515.3137046216.

The spelling of 136840634 in words is "one hundred thirty-six million, eight hundred forty thousand, six hundred thirty-four".