400913 has 4 divisors (see below), whose sum is σ = 418368. Its totient is φ = 383460.

The previous prime is 400903. The next prime is 400927. The reversal of 400913 is 319004.

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 a cyclic number.

It is not a de Polignac number, because 400913 - 2⁶ = 400849 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 400891 and 400900.

It is not an unprimeable number, because it can be changed into a prime (400903) 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, 8693 + ... + 8738.

It is an arithmetic number, because the mean of its divisors is an integer number (104592).

2⁴⁰⁰⁹¹³ is an apocalyptic number.

It is an amenable number.

400913 is a deficient number, since it is larger than the sum of its proper divisors (17455).

400913 is a wasteful number, since it uses less digits than its factorization.

400913 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17454.

The product of its (nonzero) digits is 108, while the sum is 17.

The square root of 400913 is about 633.1769105076. The cubic root of 400913 is about 73.7366460548.

Adding to 400913 its reverse (319004), we get a palindrome (719917).

The spelling of 400913 in words is "four hundred thousand, nine hundred thirteen".