901012639 has 8 divisors (see below), whose sum is σ = 924191840. Its totient is φ = 878104800.

The previous prime is 901012633. The next prime is 901012643. The reversal of 901012639 is 936210109.

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 901012639 - 2⁹ = 901012127 is a prime.

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 901012639.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (901012633) 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, 61107 + ... + 74404.

It is an arithmetic number, because the mean of its divisors is an integer number (115523980).

Almost surely, 2^901012639 is an apocalyptic number.

901012639 is a deficient number, since it is larger than the sum of its proper divisors (23179201).

901012639 is a wasteful number, since it uses less digits than its factorization.

901012639 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 135681.

The product of its (nonzero) digits is 2916, while the sum is 31.

The square root of 901012639 is about 30016.8725719386. The cubic root of 901012639 is about 965.8513571053.

The spelling of 901012639 in words is "nine hundred one million, twelve thousand, six hundred thirty-nine".