398951 has 4 divisors (see below), whose sum is σ = 455952. Its totient is φ = 341952.

The previous prime is 398941. The next prime is 398969. The reversal of 398951 is 159893.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 159893 = 127 ⋅1259.

It is a cyclic number.

It is not a de Polignac number, because 398951 - 2⁶ = 398887 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (398921) 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, 28490 + ... + 28503.

It is an arithmetic number, because the mean of its divisors is an integer number (113988).

2³⁹⁸⁹⁵¹ is an apocalyptic number.

398951 is a deficient number, since it is larger than the sum of its proper divisors (57001).

398951 is an equidigital number, since it uses as much as digits as its factorization.

398951 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 57000.

The product of its digits is 9720, while the sum is 35.

The square root of 398951 is about 631.6256802886. The cubic root of 398951 is about 73.6161644356.

The spelling of 398951 in words is "three hundred ninety-eight thousand, nine hundred fifty-one".