860201981 has 4 divisors (see below), whose sum is σ = 887950464. Its totient is φ = 832453500.

The previous prime is 860201963. The next prime is 860201983. The reversal of 860201981 is 189102068.

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.

It is a cyclic number.

It is not a de Polignac number, because 860201981 - 2¹⁸ = 859939837 is a prime.

It is a super-2 number, since 2×860201981² = 1479894896232648722, 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 (860201983) 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, 13874195 + ... + 13874256.

It is an arithmetic number, because the mean of its divisors is an integer number (221987616).

Almost surely, 2^860201981 is an apocalyptic number.

It is an amenable number.

860201981 is a deficient number, since it is larger than the sum of its proper divisors (27748483).

860201981 is a wasteful number, since it uses less digits than its factorization.

860201981 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27748482.

The product of its (nonzero) digits is 6912, while the sum is 35.

The square root of 860201981 is about 29329.2001425201. The cubic root of 860201981 is about 951.0429841514.

The spelling of 860201981 in words is "eight hundred sixty million, two hundred one thousand, nine hundred eighty-one".