901981087 has 16 divisors (see below), whose sum is σ = 1138931712. Its totient is φ = 696009600.

The previous prime is 901981081. The next prime is 901981103. The reversal of 901981087 is 780189109.

It is a cyclic number.

It is not a de Polignac number, because 901981087 - 2¹⁵ = 901948319 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 (901981081) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 162039 + ... + 167512.

It is an arithmetic number, because the mean of its divisors is an integer number (71183232).

Almost surely, 2^901981087 is an apocalyptic number.

901981087 is a deficient number, since it is larger than the sum of its proper divisors (236950625).

901981087 is a wasteful number, since it uses less digits than its factorization.

901981087 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 329598.

The product of its (nonzero) digits is 36288, while the sum is 43.

The square root of 901981087 is about 30032.9999667033. Note that the first 4 decimals coincide. The cubic root of 901981087 is about 966.1972796989.

The spelling of 901981087 in words is "nine hundred one million, nine hundred eighty-one thousand, eighty-seven".