398712733 has 4 divisors (see below), whose sum is σ = 398902140. Its totient is φ = 398523328.

The previous prime is 398712719. The next prime is 398712767. The reversal of 398712733 is 337217893.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 337217893 = 127 ⋅2655259.

It can be written as a sum of positive squares in 2 ways, for example, as 135559449 + 263153284 = 11643^2 + 16222^2 .

It is a cyclic number.

It is not a de Polignac number, because 398712733 - 2¹⁷ = 398581661 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 398712733.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (398712133) 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, 91510 + ... + 95767.

It is an arithmetic number, because the mean of its divisors is an integer number (99725535).

Almost surely, 2^398712733 is an apocalyptic number.

It is an amenable number.

398712733 is a deficient number, since it is larger than the sum of its proper divisors (189407).

398712733 is a wasteful number, since it uses less digits than its factorization.

398712733 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 189406.

The product of its digits is 190512, while the sum is 43.

The square root of 398712733 is about 19967.7923917493. The cubic root of 398712733 is about 736.0150616453.

The spelling of 398712733 in words is "three hundred ninety-eight million, seven hundred twelve thousand, seven hundred thirty-three".