398860097 has 4 divisors (see below), whose sum is σ = 399511380. Its totient is φ = 398208816.

The previous prime is 398860087. The next prime is 398860109. The reversal of 398860097 is 790068893.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 790068893 = 41 ⋅19269973.

It can be written as a sum of positive squares in 2 ways, for example, as 131079601 + 267780496 = 11449^2 + 16364^2 .

It is a cyclic number.

It is not a de Polignac number, because 398860097 - 2⁴ = 398860081 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (398860067) 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, 324722 + ... + 325947.

It is an arithmetic number, because the mean of its divisors is an integer number (99877845).

Almost surely, 2^398860097 is an apocalyptic number.

It is an amenable number.

398860097 is a deficient number, since it is larger than the sum of its proper divisors (651283).

398860097 is an equidigital number, since it uses as much as digits as its factorization.

398860097 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 651282.

The product of its (nonzero) digits is 653184, while the sum is 50.

The square root of 398860097 is about 19971.4820932248. The cubic root of 398860097 is about 736.1057273927.

The spelling of 398860097 in words is "three hundred ninety-eight million, eight hundred sixty thousand, ninety-seven".