400613 has 4 divisors (see below), whose sum is σ = 413568. Its totient is φ = 387660.

The previous prime is 400607. The next prime is 400619. The reversal of 400613 is 316004.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is an interprime number because it is at equal distance from previous prime (400607) and next prime (400619).

It is a cyclic number.

It is not a de Polignac number, because 400613 - 2⁴ = 400597 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (400619) 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, 6431 + ... + 6492.

It is an arithmetic number, because the mean of its divisors is an integer number (103392).

2⁴⁰⁰⁶¹³ is an apocalyptic number.

It is an amenable number.

400613 is a deficient number, since it is larger than the sum of its proper divisors (12955).

400613 is a wasteful number, since it uses less digits than its factorization.

400613 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12954.

The product of its (nonzero) digits is 72, while the sum is 14.

The square root of 400613 is about 632.9399655576. The cubic root of 400613 is about 73.7182492840.

Adding to 400613 its reverse (316004), we get a palindrome (716617).

The spelling of 400613 in words is "four hundred thousand, six hundred thirteen".