123579997 has 4 divisors (see below), whose sum is σ = 123634240. Its totient is φ = 123525756.

The previous prime is 123579983. The next prime is 123580001. The reversal of 123579997 is 799975321.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-123579997 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 (123579977) 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, 23547 + ... + 28312.

It is an arithmetic number, because the mean of its divisors is an integer number (30908560).

Almost surely, 2^123579997 is an apocalyptic number.

It is an amenable number.

123579997 is a deficient number, since it is larger than the sum of its proper divisors (54243).

123579997 is an equidigital number, since it uses as much as digits as its factorization.

123579997 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 54242.

The product of its digits is 1071630, while the sum is 52.

The square root of 123579997 is about 11116.6540379738. The cubic root of 123579997 is about 498.0994476213.

The spelling of 123579997 in words is "one hundred twenty-three million, five hundred seventy-nine thousand, nine hundred ninety-seven".