398561123 has 8 divisors (see below), whose sum is σ = 422362080. Its totient is φ = 375430720.

The previous prime is 398561087. The next prime is 398561147. The reversal of 398561123 is 321165893.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 398561123 - 2¹⁴ = 398544739 is a prime.

It is a super-2 number, since 2×398561123² = 317701937534042258, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (398561183) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 166415 + ... + 168792.

It is an arithmetic number, because the mean of its divisors is an integer number (52795260).

Almost surely, 2^398561123 is an apocalyptic number.

398561123 is a deficient number, since it is larger than the sum of its proper divisors (23800957).

398561123 is a wasteful number, since it uses less digits than its factorization.

398561123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 335277.

The product of its digits is 38880, while the sum is 38.

The square root of 398561123 is about 19963.9956672005. The cubic root of 398561123 is about 735.9217602273.

The spelling of 398561123 in words is "three hundred ninety-eight million, five hundred sixty-one thousand, one hundred twenty-three".