901638013 has 4 divisors (see below), whose sum is σ = 901711360. Its totient is φ = 901564668.

The previous prime is 901637987. The next prime is 901638037. The reversal of 901638013 is 310836109.

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 a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 901638013 - 2⁹ = 901637501 is a prime.

It is a super-2 number, since 2×901638013² = 1625902212973176338, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (901638053) 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, 13245 + ... + 44482.

It is an arithmetic number, because the mean of its divisors is an integer number (225427840).

Almost surely, 2^901638013 is an apocalyptic number.

It is an amenable number.

901638013 is a deficient number, since it is larger than the sum of its proper divisors (73347).

901638013 is a wasteful number, since it uses less digits than its factorization.

901638013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 73346.

The product of its (nonzero) digits is 3888, while the sum is 31.

The square root of 901638013 is about 30027.2878062605. The cubic root of 901638013 is about 966.0747644912.

The spelling of 901638013 in words is "nine hundred one million, six hundred thirty-eight thousand, thirteen".