397526493 has 64 divisors (see below), whose sum is σ = 692213760. Its totient is φ = 197054208.

The previous prime is 397526473. The next prime is 397526501. The reversal of 397526493 is 394625793.

It is a happy number.

It is not a de Polignac number, because 397526493 - 2¹⁴ = 397510109 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (397526413) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 897130 + ... + 897572.

It is an arithmetic number, because the mean of its divisors is an integer number (10815840).

Almost surely, 2^397526493 is an apocalyptic number.

It is an amenable number.

397526493 is a deficient number, since it is larger than the sum of its proper divisors (294687267).

397526493 is a wasteful number, since it uses less digits than its factorization.

397526493 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 658.

The product of its digits is 1224720, while the sum is 48.

The square root of 397526493 is about 19938.0664308252. The cubic root of 397526493 is about 735.2844121209.

The spelling of 397526493 in words is "three hundred ninety-seven million, five hundred twenty-six thousand, four hundred ninety-three".