136679481 has 21 divisors (see below), whose sum is σ = 205399839. Its totient is φ = 90909216.

The previous prime is 136679479. The next prime is 136679497. The reversal of 136679481 is 184976631.

It is a happy number.

The square root of 136679481 is 11691.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 15327225 + 121352256 = 3915^2 + 11016^2 .

It is not a de Polignac number, because 136679481 - 2¹ = 136679479 is a prime.

It is a super-2 number, since 2×136679481² = 37362561052858722, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (136679441) by changing a digit.

It is a polite number, since it can be written in 20 ways as a sum of consecutive naturals, for example, 315441 + ... + 315873.

Almost surely, 2^136679481 is an apocalyptic number.

136679481 is the 11691-st square number.

136679481 is the 5846-th centered octagonal number.

It is an amenable number.

136679481 is a deficient number, since it is larger than the sum of its proper divisors (68720358).

136679481 is an frugal number, since it uses more digits than its factorization.

136679481 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 884 (or 436 counting only the distinct ones).

The product of its digits is 217728, while the sum is 45.

The cubic root of 136679481 is about 515.1113354667. Note that the first 3 decimals are identical.

The spelling of 136679481 in words is "one hundred thirty-six million, six hundred seventy-nine thousand, four hundred eighty-one".