393047897 has 16 divisors (see below), whose sum is σ = 451795968. Its totient is φ = 338440080.

The previous prime is 393047891. The next prime is 393047903. The reversal of 393047897 is 798740393.

It is an interprime number because it is at equal distance from previous prime (393047891) and next prime (393047903).

It is not a de Polignac number, because 393047897 - 2⁴ = 393047881 is a prime.

It is a super-2 number, since 2×393047897² = 308973298672245218, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (393047891) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 18518 + ... + 33600.

It is an arithmetic number, because the mean of its divisors is an integer number (28237248).

Almost surely, 2^393047897 is an apocalyptic number.

It is an amenable number.

393047897 is a deficient number, since it is larger than the sum of its proper divisors (58748071).

393047897 is a wasteful number, since it uses less digits than its factorization.

393047897 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15220.

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

The square root of 393047897 is about 19825.4356068158. The cubic root of 393047897 is about 732.5127004519.

The spelling of 393047897 in words is "three hundred ninety-three million, forty-seven thousand, eight hundred ninety-seven".