122775887 has 16 divisors (see below), whose sum is σ = 140488992. Its totient is φ = 106291200.

The previous prime is 122775881. The next prime is 122775889. The reversal of 122775887 is 788577221.

It is a cyclic number.

It is not a de Polignac number, because 122775887 - 2¹⁶ = 122710351 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (122775881) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 75887 + ... + 77487.

It is an arithmetic number, because the mean of its divisors is an integer number (8780562).

Almost surely, 2^122775887 is an apocalyptic number.

122775887 is a gapful number since it is divisible by the number (17) formed by its first and last digit.

122775887 is a deficient number, since it is larger than the sum of its proper divisors (17713105).

122775887 is a wasteful number, since it uses less digits than its factorization.

122775887 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1978.

The product of its digits is 439040, while the sum is 47.

The square root of 122775887 is about 11080.4281054479. The cubic root of 122775887 is about 497.0167518614.

The spelling of 122775887 in words is "one hundred twenty-two million, seven hundred seventy-five thousand, eight hundred eighty-seven".