861926201 has 4 divisors (see below), whose sum is σ = 889730304. Its totient is φ = 834122100.

The previous prime is 861926183. The next prime is 861926207. The reversal of 861926201 is 102629168.

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 a de Polignac number, because none of the positive numbers 2^k-861926201 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (861926207) 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, 13902005 + ... + 13902066.

It is an arithmetic number, because the mean of its divisors is an integer number (222432576).

Almost surely, 2^861926201 is an apocalyptic number.

It is an amenable number.

861926201 is a deficient number, since it is larger than the sum of its proper divisors (27804103).

861926201 is a wasteful number, since it uses less digits than its factorization.

861926201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27804102.

The product of its (nonzero) digits is 10368, while the sum is 35.

The square root of 861926201 is about 29358.5796829479. The cubic root of 861926201 is about 951.6779950593.

The spelling of 861926201 in words is "eight hundred sixty-one million, nine hundred twenty-six thousand, two hundred one".