913409 has 8 divisors (see below), whose sum is σ = 1065600. Its totient is φ = 782628.

The previous prime is 913397. The next prime is 913417. The reversal of 913409 is 904319.

It is a happy number.

It is a de Polignac number, because none of the positive numbers 2^k-913409 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (913309) 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, 989 + ... + 1674.

It is an arithmetic number, because the mean of its divisors is an integer number (133200).

It is a Proth number, since it is equal to 223 ⋅ 2¹² + 1 and 223 < 2¹².

2⁹¹³⁴⁰⁹ is an apocalyptic number.

It is an amenable number.

913409 is a deficient number, since it is larger than the sum of its proper divisors (152191).

913409 is an equidigital number, since it uses as much as digits as its factorization.

913409 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2684 (or 2670 counting only the distinct ones).

The product of its (nonzero) digits is 972, while the sum is 26.

The square root of 913409 is about 955.7243326399. The cubic root of 913409 is about 97.0260673202.

The spelling of 913409 in words is "nine hundred thirteen thousand, four hundred nine".