397022989 has 8 divisors (see below), whose sum is σ = 433300032. Its totient is φ = 360776640.

The previous prime is 397022971. The next prime is 397023001. The reversal of 397022989 is 989220793.

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 397022989 - 2⁷ = 397022861 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (397022929) 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, 25717 + ... + 38149.

It is an arithmetic number, because the mean of its divisors is an integer number (54162504).

Almost surely, 2^397022989 is an apocalyptic number.

It is an amenable number.

397022989 is a deficient number, since it is larger than the sum of its proper divisors (36277043).

397022989 is a wasteful number, since it uses less digits than its factorization.

397022989 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15347.

The product of its (nonzero) digits is 489888, while the sum is 49.

The square root of 397022989 is about 19925.4357292381. The cubic root of 397022989 is about 734.9738457690.

The spelling of 397022989 in words is "three hundred ninety-seven million, twenty-two thousand, nine hundred eighty-nine".