861248707 has 4 divisors (see below), whose sum is σ = 939544056. Its totient is φ = 782953360.

The previous prime is 861248693. The next prime is 861248711. The reversal of 861248707 is 707842168.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 861248707 - 2¹⁵ = 861215939 is a prime.

It is not an unprimeable number, because it can be changed into a prime (861248807) 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, 39147658 + ... + 39147679.

It is an arithmetic number, because the mean of its divisors is an integer number (234886014).

Almost surely, 2^861248707 is an apocalyptic number.

861248707 is a deficient number, since it is larger than the sum of its proper divisors (78295349).

861248707 is a wasteful number, since it uses less digits than its factorization.

861248707 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 78295348.

The product of its (nonzero) digits is 150528, while the sum is 43.

The square root of 861248707 is about 29347.0391521871. The cubic root of 861248707 is about 951.4285827022.

The spelling of 861248707 in words is "eight hundred sixty-one million, two hundred forty-eight thousand, seven hundred seven".