122999387 has 4 divisors (see below), whose sum is σ = 140570736. Its totient is φ = 105428040.

The previous prime is 122999381. The next prime is 122999399. The reversal of 122999387 is 783999221.

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 122999387 - 2⁶ = 122999323 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (122999381) 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, 8785664 + ... + 8785677.

It is an arithmetic number, because the mean of its divisors is an integer number (35142684).

Almost surely, 2^122999387 is an apocalyptic number.

122999387 is a deficient number, since it is larger than the sum of its proper divisors (17571349).

122999387 is an equidigital number, since it uses as much as digits as its factorization.

122999387 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17571348.

The product of its digits is 489888, while the sum is 50.

The square root of 122999387 is about 11090.5088702007. The cubic root of 122999387 is about 497.3181571560.

The spelling of 122999387 in words is "one hundred twenty-two million, nine hundred ninety-nine thousand, three hundred eighty-seven".