122739487 has 16 divisors (see below), whose sum is σ = 140837760. Its totient is φ = 106024032.

The previous prime is 122739481. The next prime is 122739493. The reversal of 122739487 is 784937221.

It is an interprime number because it is at equal distance from previous prime (122739481) and next prime (122739493).

It is a cyclic number.

It is not a de Polignac number, because 122739487 - 2⁷ = 122739359 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 (122739481) 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, 17508 + ... + 23494.

It is an arithmetic number, because the mean of its divisors is an integer number (8802360).

Almost surely, 2^122739487 is an apocalyptic number.

122739487 is a deficient number, since it is larger than the sum of its proper divisors (18098273).

122739487 is a wasteful number, since it uses less digits than its factorization.

122739487 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6102.

The product of its digits is 169344, while the sum is 43.

The square root of 122739487 is about 11078.7854478729. The cubic root of 122739487 is about 496.9676293005.

The spelling of 122739487 in words is "one hundred twenty-two million, seven hundred thirty-nine thousand, four hundred eighty-seven".