121372387 has 4 divisors (see below), whose sum is σ = 121400136. Its totient is φ = 121344640.

The previous prime is 121372379. The next prime is 121372397. The reversal of 121372387 is 783273121.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 121372387 - 2³ = 121372379 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (121372327) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5713 + ... + 16594.

It is an arithmetic number, because the mean of its divisors is an integer number (30350034).

Almost surely, 2^121372387 is an apocalyptic number.

121372387 is a deficient number, since it is larger than the sum of its proper divisors (27749).

121372387 is an equidigital number, since it uses as much as digits as its factorization.

121372387 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27748.

The product of its digits is 14112, while the sum is 34.

The square root of 121372387 is about 11016.9136785218. The cubic root of 121372387 is about 495.1156237740.

The spelling of 121372387 in words is "one hundred twenty-one million, three hundred seventy-two thousand, three hundred eighty-seven".