398132497 has 6 divisors (see below), whose sum is σ = 463133778. Its totient is φ = 341256384.

The previous prime is 398132477. The next prime is 398132513. The reversal of 398132497 is 794231893.

It can be written as a sum of positive squares in only one way, i.e., 339701761 + 58430736 = 18431^2 + 7644^2 .

It is not a de Polignac number, because 398132497 - 2¹¹ = 398130449 is a prime.

It is a super-3 number, since 3×398132497³ (a number of 27 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (398132407) 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, 4062528 + ... + 4062625.

It is an arithmetic number, because the mean of its divisors is an integer number (77188963).

Almost surely, 2^398132497 is an apocalyptic number.

It is an amenable number.

398132497 is a deficient number, since it is larger than the sum of its proper divisors (65001281).

398132497 is an equidigital number, since it uses as much as digits as its factorization.

398132497 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8125167 (or 8125160 counting only the distinct ones).

The product of its digits is 326592, while the sum is 46.

The square root of 398132497 is about 19953.2578041782. The cubic root of 398132497 is about 735.6578539519.

The spelling of 398132497 in words is "three hundred ninety-eight million, one hundred thirty-two thousand, four hundred ninety-seven".