397046787 has 4 divisors (see below), whose sum is σ = 529395720. Its totient is φ = 264697856.

The previous prime is 397046773. The next prime is 397046809. The reversal of 397046787 is 787640793.

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 397046787 - 2¹⁵ = 397014019 is a prime.

It is not an unprimeable number, because it can be changed into a prime (397046737) 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, 66174462 + ... + 66174467.

It is an arithmetic number, because the mean of its divisors is an integer number (132348930).

Almost surely, 2^397046787 is an apocalyptic number.

397046787 is a deficient number, since it is larger than the sum of its proper divisors (132348933).

397046787 is a wasteful number, since it uses less digits than its factorization.

397046787 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 132348932.

The product of its (nonzero) digits is 1778112, while the sum is 51.

The square root of 397046787 is about 19926.0328966907. The cubic root of 397046787 is about 734.9885305258.

The spelling of 397046787 in words is "three hundred ninety-seven million, forty-six thousand, seven hundred eighty-seven".