398714531 has 4 divisors (see below), whose sum is σ = 401254272. Its totient is φ = 396174792.

The previous prime is 398714471. The next prime is 398714567. The reversal of 398714531 is 135417893.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 135417893 = 13 ⋅10416761.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-398714531 is a prime.

It is a super-2 number, since 2×398714531² = 317946554461099922, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (398714581) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1269635 + ... + 1269948.

It is an arithmetic number, because the mean of its divisors is an integer number (100313568).

Almost surely, 2^398714531 is an apocalyptic number.

398714531 is a deficient number, since it is larger than the sum of its proper divisors (2539741).

398714531 is a wasteful number, since it uses less digits than its factorization.

398714531 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2539740.

The product of its digits is 90720, while the sum is 41.

The square root of 398714531 is about 19967.8374142019. The cubic root of 398714531 is about 736.0161680000.

The spelling of 398714531 in words is "three hundred ninety-eight million, seven hundred fourteen thousand, five hundred thirty-one".