121679730 has 24 divisors (see below), whose sum is σ = 316367532. Its totient is φ = 32447904.

The previous prime is 121679713. The next prime is 121679731. The reversal of 121679730 is 37976121.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 120099681 + 1580049 = 10959^2 + 1257^2 .

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (121679731) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 675909 + ... + 676088.

Almost surely, 2^121679730 is an apocalyptic number.

121679730 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

121679730 is an abundant number, since it is smaller than the sum of its proper divisors (194687802).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

121679730 is a wasteful number, since it uses less digits than its factorization.

121679730 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1352010 (or 1352007 counting only the distinct ones).

The product of its (nonzero) digits is 15876, while the sum is 36.

The square root of 121679730 is about 11030.8535481168. The cubic root of 121679730 is about 495.5331873342.

The spelling of 121679730 in words is "one hundred twenty-one million, six hundred seventy-nine thousand, seven hundred thirty".