126923999 has 4 divisors (see below), whose sum is σ = 127071936. Its totient is φ = 126776064.

The previous prime is 126923969. The next prime is 126924001. The reversal of 126923999 is 999329621.

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 126923999 - 2²⁴ = 110146783 is a prime.

It is a super-2 number, since 2×126923999² = 32219403044304002, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (126923969) 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, 72674 + ... + 74399.

It is an arithmetic number, because the mean of its divisors is an integer number (31767984).

Almost surely, 2^126923999 is an apocalyptic number.

126923999 is a deficient number, since it is larger than the sum of its proper divisors (147937).

126923999 is an equidigital number, since it uses as much as digits as its factorization.

126923999 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 147936.

The product of its digits is 472392, while the sum is 50.

The square root of 126923999 is about 11266.0551658511. The cubic root of 126923999 is about 502.5522815499.

The spelling of 126923999 in words is "one hundred twenty-six million, nine hundred twenty-three thousand, nine hundred ninety-nine".