901813 has 12 divisors (see below), whose sum is σ = 1029420. Its totient is φ = 788480.

The previous prime is 901811. The next prime is 901819. The reversal of 901813 is 318109.

It can be written as a sum of positive squares in 2 ways, for example, as 736164 + 165649 = 858^2 + 407^2 .

It is not a de Polignac number, because 901813 - 2¹ = 901811 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 (901811) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3381 + ... + 3637.

It is an arithmetic number, because the mean of its divisors is an integer number (85785).

2⁹⁰¹⁸¹³ is an apocalyptic number.

It is an amenable number.

901813 is a deficient number, since it is larger than the sum of its proper divisors (127607).

901813 is a wasteful number, since it uses less digits than its factorization.

901813 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 308 (or 297 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 22.

The square root of 901813 is about 949.6383522163. The cubic root of 901813 is about 96.6137258008.

The spelling of 901813 in words is "nine hundred one thousand, eight hundred thirteen".