397650089 has 4 divisors (see below), whose sum is σ = 398079060. Its totient is φ = 397221120.

The previous prime is 397650079. The next prime is 397650101. The reversal of 397650089 is 980056793.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 980056793 = 1619 ⋅605347.

It can be written as a sum of positive squares in 2 ways, for example, as 118091689 + 279558400 = 10867^2 + 16720^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-397650089 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (397650049) 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, 213092 + ... + 214949.

It is an arithmetic number, because the mean of its divisors is an integer number (99519765).

Almost surely, 2^397650089 is an apocalyptic number.

It is an amenable number.

397650089 is a deficient number, since it is larger than the sum of its proper divisors (428971).

397650089 is an equidigital number, since it uses as much as digits as its factorization.

397650089 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 428970.

The product of its (nonzero) digits is 408240, while the sum is 47.

The square root of 397650089 is about 19941.1656880936. The cubic root of 397650089 is about 735.3606072903.

The spelling of 397650089 in words is "three hundred ninety-seven million, six hundred fifty thousand, eighty-nine".