398923734723 has 8 divisors (see below), whose sum is σ = 531921715728. Its totient is φ = 265937455104.

The previous prime is 398923734709. The next prime is 398923734733. The reversal of 398923734723 is 327437329893.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 398923734723 - 2⁹ = 398923734211 is a prime.

It is a super-2 number, since 2×398923734723² (a number of 24 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (398923734733) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2845486 + ... + 2982387.

It is an arithmetic number, because the mean of its divisors is an integer number (66490214466).

Almost surely, 2^398923734723 is an apocalyptic number.

398923734723 is a deficient number, since it is larger than the sum of its proper divisors (132997981005).

398923734723 is a wasteful number, since it uses less digits than its factorization.

398923734723 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5850693.

The product of its digits is 41150592, while the sum is 60.

The spelling of 398923734723 in words is "three hundred ninety-eight billion, nine hundred twenty-three million, seven hundred thirty-four thousand, seven hundred twenty-three".