1046861861 has 4 divisors (see below), whose sum is σ = 1046960832. Its totient is φ = 1046762892.

The previous prime is 1046861857. The next prime is 1046861873. The reversal of 1046861861 is 1681686401.

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, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 1681686401 = 39857 ⋅42193.

It is a cyclic number.

It is not a de Polignac number, because 1046861861 - 2² = 1046861857 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 (1046861161) 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, 31421 + ... + 55506.

It is an arithmetic number, because the mean of its divisors is an integer number (261740208).

Almost surely, 2^1046861861 is an apocalyptic number.

It is an amenable number.

1046861861 is a deficient number, since it is larger than the sum of its proper divisors (98971).

1046861861 is an equidigital number, since it uses as much as digits as its factorization.

1046861861 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 98970.

The product of its (nonzero) digits is 55296, while the sum is 41.

The square root of 1046861861 is about 32355.2447216831. The cubic root of 1046861861 is about 1015.3827771589.

The spelling of 1046861861 in words is "one billion, forty-six million, eight hundred sixty-one thousand, eight hundred sixty-one".