121779630 has 48 divisors (see below), whose sum is σ = 361861344. Its totient is φ = 27835200.

The previous prime is 121779629. The next prime is 121779659. The reversal of 121779630 is 36977121.

It is a happy number.

121779630 is a `hidden beast` number, since 1 + 2 + 17 + 7 + 9 + 630 = 666.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 96021 + ... + 97280.

It is an arithmetic number, because the mean of its divisors is an integer number (7538778).

Almost surely, 2^121779630 is an apocalyptic number.

121779630 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

121779630 is an abundant number, since it is smaller than the sum of its proper divisors (240081714).

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

121779630 is a wasteful number, since it uses less digits than its factorization.

121779630 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 193321 (or 193318 counting only the distinct ones).

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

The square root of 121779630 is about 11035.3808271396. The cubic root of 121779630 is about 495.6687624321.

The spelling of 121779630 in words is "one hundred twenty-one million, seven hundred seventy-nine thousand, six hundred thirty".