399197053 has 4 divisors (see below), whose sum is σ = 399420508. Its totient is φ = 398973600.

The previous prime is 399197041. The next prime is 399197063. The reversal of 399197053 is 350791993.

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

It can be written as a sum of positive squares in 2 ways, for example, as 41306329 + 357890724 = 6427^2 + 18918^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-399197053 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 399196994 and 399197012.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (399197023) 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, 109026 + ... + 112627.

It is an arithmetic number, because the mean of its divisors is an integer number (99855127).

Almost surely, 2^399197053 is an apocalyptic number.

It is an amenable number.

399197053 is a deficient number, since it is larger than the sum of its proper divisors (223455).

399197053 is a wasteful number, since it uses less digits than its factorization.

399197053 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 223454.

The product of its (nonzero) digits is 229635, while the sum is 46.

The square root of 399197053 is about 19979.9162410657. The cubic root of 399197053 is about 736.3129557999.

The spelling of 399197053 in words is "three hundred ninety-nine million, one hundred ninety-seven thousand, fifty-three".