397521453 has 16 divisors (see below), whose sum is σ = 606122496. Its totient is φ = 227014320.

The previous prime is 397521433. The next prime is 397521461. The reversal of 397521453 is 354125793.

It is a happy number.

It is not a de Polignac number, because 397521453 - 2¹² = 397517357 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (397521413) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 35650 + ... + 45452.

It is an arithmetic number, because the mean of its divisors is an integer number (37882656).

Almost surely, 2^397521453 is an apocalyptic number.

It is an amenable number.

397521453 is a deficient number, since it is larger than the sum of its proper divisors (208601043).

397521453 is a wasteful number, since it uses less digits than its factorization.

397521453 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11744.

The product of its digits is 113400, while the sum is 39.

The square root of 397521453 is about 19937.9400390311. The cubic root of 397521453 is about 735.2813046977.

The spelling of 397521453 in words is "three hundred ninety-seven million, five hundred twenty-one thousand, four hundred fifty-three".