862217961 has 32 divisors (see below), whose sum is σ = 1284304896. Its totient is φ = 510048000.

The previous prime is 862217957. The next prime is 862217963. The reversal of 862217961 is 169712268.

It is not a de Polignac number, because 862217961 - 2² = 862217957 is a prime.

It is not an unprimeable number, because it can be changed into a prime (862217963) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 978241 + ... + 979121.

It is an arithmetic number, because the mean of its divisors is an integer number (40134528).

Almost surely, 2^862217961 is an apocalyptic number.

It is an amenable number.

862217961 is a deficient number, since it is larger than the sum of its proper divisors (422086935).

862217961 is a wasteful number, since it uses less digits than its factorization.

862217961 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1573.

The product of its digits is 72576, while the sum is 42.

The square root of 862217961 is about 29363.5481677538. The cubic root of 862217961 is about 951.7853632030.

The spelling of 862217961 in words is "eight hundred sixty-two million, two hundred seventeen thousand, nine hundred sixty-one".