840107961 has 72 divisors (see below), whose sum is σ = 1535020032. Its totient is φ = 433382400.

The previous prime is 840107953. The next prime is 840107981. The reversal of 840107961 is 169701048.

It is not a de Polignac number, because 840107961 - 2³ = 840107953 is a prime.

It is a super-2 number, since 2×840107961² = 1411562772271155042, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (840107941) by changing a digit.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 1455705 + ... + 1456281.

Almost surely, 2^840107961 is an apocalyptic number.

It is an amenable number.

840107961 is a deficient number, since it is larger than the sum of its proper divisors (694912071).

840107961 is a wasteful number, since it uses less digits than its factorization.

840107961 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 803 (or 789 counting only the distinct ones).

The product of its (nonzero) digits is 12096, while the sum is 36.

The square root of 840107961 is about 28984.6159367344. The cubic root of 840107961 is about 943.5792171062.

It can be divided in two parts, 840 and 107961, that added together give a palindrome (108801).

The spelling of 840107961 in words is "eight hundred forty million, one hundred seven thousand, nine hundred sixty-one".