393700969 has 2 divisors, whose sum is σ = 393700970. Its totient is φ = 393700968.

The previous prime is 393700963. The next prime is 393700973. The reversal of 393700969 is 969007393.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 359595369 + 34105600 = 18963^2 + 5840^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-393700969 is a prime.

It is a super-2 number, since 2×393700969² = 310000905983077922, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (393700963) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 196850484 + 196850485.

It is an arithmetic number, because the mean of its divisors is an integer number (196850485).

Almost surely, 2^393700969 is an apocalyptic number.

It is an amenable number.

393700969 is a deficient number, since it is larger than the sum of its proper divisors (1).

393700969 is an equidigital number, since it uses as much as digits as its factorization.

393700969 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 275562, while the sum is 46.

The square root of 393700969 is about 19841.8993294493. The cubic root of 393700969 is about 732.9181801472.

The spelling of 393700969 in words is "three hundred ninety-three million, seven hundred thousand, nine hundred sixty-nine".