399963065 has 8 divisors (see below), whose sum is σ = 488090880. Its totient is φ = 314546992.

The previous prime is 399963061. The next prime is 399963071. The reversal of 399963065 is 560369993.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 399963065 - 2² = 399963061 is a prime.

It is not an unprimeable number, because it can be changed into a prime (399963061) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 677609 + ... + 678198.

It is an arithmetic number, because the mean of its divisors is an integer number (61011360).

Almost surely, 2^399963065 is an apocalyptic number.

It is an amenable number.

399963065 is a deficient number, since it is larger than the sum of its proper divisors (88127815).

399963065 is a wasteful number, since it uses less digits than its factorization.

399963065 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1355871.

The product of its (nonzero) digits is 1180980, while the sum is 50.

The square root of 399963065 is about 19999.0766036835. The cubic root of 399963065 is about 736.7836207461.

The spelling of 399963065 in words is "three hundred ninety-nine million, nine hundred sixty-three thousand, sixty-five".