122679999 has 24 divisors (see below), whose sum is σ = 199137120. Its totient is φ = 72211392.

The previous prime is 122679983. The next prime is 122680021. The reversal of 122679999 is 999976221.

It is not a de Polignac number, because 122679999 - 2⁴ = 122679983 is a prime.

It is a plaindrome in base 10.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (122678999) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 20104 + ... + 25485.

It is an arithmetic number, because the mean of its divisors is an integer number (8297380).

Almost surely, 2^122679999 is an apocalyptic number.

122679999 is a deficient number, since it is larger than the sum of its proper divisors (76457121).

122679999 is a wasteful number, since it uses less digits than its factorization.

122679999 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45631 (or 45628 counting only the distinct ones).

The product of its digits is 1102248, while the sum is 54.

The square root of 122679999 is about 11076.1003516581. The cubic root of 122679999 is about 496.8873280909.

It can be divided in two parts, 1226 and 79999, that added together give a square (81225 = 285²).

The spelling of 122679999 in words is "one hundred twenty-two million, six hundred seventy-nine thousand, nine hundred ninety-nine".