121773870 has 24 divisors (see below), whose sum is σ = 316612296. Its totient is φ = 32473008.

The previous prime is 121773857. The next prime is 121773881. The reversal of 121773870 is 78377121.

It is a happy number.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 676432 + ... + 676611.

It is an arithmetic number, because the mean of its divisors is an integer number (13192179).

Almost surely, 2^121773870 is an apocalyptic number.

121773870 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

121773870 is an abundant number, since it is smaller than the sum of its proper divisors (194838426).

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

121773870 is a wasteful number, since it uses less digits than its factorization.

121773870 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1353056 (or 1353053 counting only the distinct ones).

The product of its (nonzero) digits is 16464, while the sum is 36.

The square root of 121773870 is about 11035.1198452939. The cubic root of 121773870 is about 495.6609475042.

The spelling of 121773870 in words is "one hundred twenty-one million, seven hundred seventy-three thousand, eight hundred seventy".