917013421 has 8 divisors (see below), whose sum is σ = 940988664. Its totient is φ = 893114880.

The previous prime is 917013401. The next prime is 917013431. The reversal of 917013421 is 124310719.

917013421 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 222427396 + 694586025 = 14914^2 + 26355^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 917013421 - 2¹⁵ = 916980653 is a prime.

It is a super-2 number, since 2×917013421² = 1681827228588246482, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 917013421.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (917013401) 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, 5455 + ... + 43171.

It is an arithmetic number, because the mean of its divisors is an integer number (117623583).

Almost surely, 2^917013421 is an apocalyptic number.

It is an amenable number.

917013421 is a deficient number, since it is larger than the sum of its proper divisors (23975243).

917013421 is a wasteful number, since it uses less digits than its factorization.

917013421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38351.

The product of its (nonzero) digits is 1512, while the sum is 28.

The square root of 917013421 is about 30282.2294588757. The cubic root of 917013421 is about 971.5352529517.

The spelling of 917013421 in words is "nine hundred seventeen million, thirteen thousand, four hundred twenty-one".