913649 has 4 divisors (see below), whose sum is σ = 996720. Its totient is φ = 830580.

The previous prime is 913639. The next prime is 913687. The reversal of 913649 is 946319.

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, and also an emirpimes, since its reverse is a distinct semiprime: 946319 = 11 ⋅86029.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-913649 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (913639) 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, 41519 + ... + 41540.

It is an arithmetic number, because the mean of its divisors is an integer number (249180).

2⁹¹³⁶⁴⁹ is an apocalyptic number.

It is an amenable number.

913649 is a deficient number, since it is larger than the sum of its proper divisors (83071).

913649 is a wasteful number, since it uses less digits than its factorization.

913649 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 83070.

The product of its digits is 5832, while the sum is 32.

The square root of 913649 is about 955.8498836114. The cubic root of 913649 is about 97.0345645056.

The spelling of 913649 in words is "nine hundred thirteen thousand, six hundred forty-nine".