400504513 has 4 divisors (see below), whose sum is σ = 424063620. Its totient is φ = 376945408.

The previous prime is 400504501. The next prime is 400504519. The reversal of 400504513 is 315405004.

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 344733489 + 55771024 = 18567^2 + 7468^2 .

It is a cyclic number.

It is not a de Polignac number, because 400504513 - 2⁹ = 400504001 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (400504519) 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, 11779528 + ... + 11779561.

It is an arithmetic number, because the mean of its divisors is an integer number (106015905).

Almost surely, 2^400504513 is an apocalyptic number.

It is an amenable number.

400504513 is a deficient number, since it is larger than the sum of its proper divisors (23559107).

400504513 is a wasteful number, since it uses less digits than its factorization.

400504513 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23559106.

The product of its (nonzero) digits is 1200, while the sum is 22.

The square root of 400504513 is about 20012.6088504223. The cubic root of 400504513 is about 737.1159432125.

Adding to 400504513 its reverse (315405004), we get a palindrome (715909517).

The spelling of 400504513 in words is "four hundred million, five hundred four thousand, five hundred thirteen".