864978753 has 4 divisors (see below), whose sum is σ = 1153305008. Its totient is φ = 576652500.

The previous prime is 864978731. The next prime is 864978757. The reversal of 864978753 is 357879468.

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 not a de Polignac number, because 864978753 - 2⁶ = 864978689 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 864978693 and 864978702.

It is not an unprimeable number, because it can be changed into a prime (864978757) 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, 144163123 + ... + 144163128.

It is an arithmetic number, because the mean of its divisors is an integer number (288326252).

Almost surely, 2^864978753 is an apocalyptic number.

It is an amenable number.

864978753 is a deficient number, since it is larger than the sum of its proper divisors (288326255).

864978753 is a wasteful number, since it uses less digits than its factorization.

864978753 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 288326254.

The product of its digits is 10160640, while the sum is 57.

The square root of 864978753 is about 29410.5211276509. The cubic root of 864978753 is about 952.8001421150.

The spelling of 864978753 in words is "eight hundred sixty-four million, nine hundred seventy-eight thousand, seven hundred fifty-three".