398623372499 has 4 divisors (see below), whose sum is σ = 434861860920. Its totient is φ = 362384884080.

The previous prime is 398623372423. The next prime is 398623372501. The reversal of 398623372499 is 994273326893.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-398623372499 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (398623372409) 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, 18119244194 + ... + 18119244215.

It is an arithmetic number, because the mean of its divisors is an integer number (108715465230).

Almost surely, 2^398623372499 is an apocalyptic number.

398623372499 is a deficient number, since it is larger than the sum of its proper divisors (36238488421).

398623372499 is a wasteful number, since it uses less digits than its factorization.

398623372499 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36238488420.

The product of its digits is 105815808, while the sum is 65.

The spelling of 398623372499 in words is "three hundred ninety-eight billion, six hundred twenty-three million, three hundred seventy-two thousand, four hundred ninety-nine".