398733723 has 6 divisors (see below), whose sum is σ = 575948724. Its totient is φ = 265822476.

The previous prime is 398733689. The next prime is 398733757. The reversal of 398733723 is 327337893.

It is an interprime number because it is at equal distance from previous prime (398733689) and next prime (398733757).

It is not a de Polignac number, because 398733723 - 2⁹ = 398733211 is a prime.

It is not an unprimeable number, because it can be changed into a prime (398733763) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 22151865 + ... + 22151882.

It is an arithmetic number, because the mean of its divisors is an integer number (95991454).

Almost surely, 2^398733723 is an apocalyptic number.

398733723 is a deficient number, since it is larger than the sum of its proper divisors (177215001).

398733723 is a wasteful number, since it uses less digits than its factorization.

398733723 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44303753 (or 44303750 counting only the distinct ones).

The product of its digits is 571536, while the sum is 45.

The square root of 398733723 is about 19968.3179812422. The cubic root of 398733723 is about 736.0279771137.

The spelling of 398733723 in words is "three hundred ninety-eight million, seven hundred thirty-three thousand, seven hundred twenty-three".