398100697 has 4 divisors (see below), whose sum is σ = 398256820. Its totient is φ = 397944576.

The previous prime is 398100653. The next prime is 398100709. The reversal of 398100697 is 796001893.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 251666496 + 146434201 = 15864^2 + 12101^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-398100697 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (398100617) 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, 74172 + ... + 79357.

It is an arithmetic number, because the mean of its divisors is an integer number (99564205).

Almost surely, 2^398100697 is an apocalyptic number.

It is an amenable number.

398100697 is a deficient number, since it is larger than the sum of its proper divisors (156123).

398100697 is a wasteful number, since it uses less digits than its factorization.

398100697 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 156122.

The product of its (nonzero) digits is 81648, while the sum is 43.

The square root of 398100697 is about 19952.4609259109. The cubic root of 398100697 is about 735.6382670532.

The spelling of 398100697 in words is "three hundred ninety-eight million, one hundred thousand, six hundred ninety-seven".