397930487 has 4 divisors (see below), whose sum is σ = 403869816. Its totient is φ = 391991160.

The previous prime is 397930483. The next prime is 397930493. The reversal of 397930487 is 784039793.

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

It is a cyclic number.

It is not a de Polignac number, because 397930487 - 2² = 397930483 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (397930483) 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, 2969564 + ... + 2969697.

It is an arithmetic number, because the mean of its divisors is an integer number (100967454).

Almost surely, 2^397930487 is an apocalyptic number.

397930487 is a deficient number, since it is larger than the sum of its proper divisors (5939329).

397930487 is an equidigital number, since it uses as much as digits as its factorization.

397930487 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5939328.

The product of its (nonzero) digits is 1143072, while the sum is 50.

The square root of 397930487 is about 19948.1950812599. The cubic root of 397930487 is about 735.5334101332.

The spelling of 397930487 in words is "three hundred ninety-seven million, nine hundred thirty thousand, four hundred eighty-seven".