869749653 has 4 divisors (see below), whose sum is σ = 1159666208. Its totient is φ = 579833100.

The previous prime is 869749583. The next prime is 869749703. The reversal of 869749653 is 356947968.

It is a happy number.

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 869749653 - 2⁹ = 869749141 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 869749593 and 869749602.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (869748653) 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, 144958273 + ... + 144958278.

It is an arithmetic number, because the mean of its divisors is an integer number (289916552).

Almost surely, 2^869749653 is an apocalyptic number.

It is an amenable number.

869749653 is a deficient number, since it is larger than the sum of its proper divisors (289916555).

869749653 is a wasteful number, since it uses less digits than its factorization.

869749653 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 289916554.

The product of its digits is 9797760, while the sum is 57.

The square root of 869749653 is about 29491.5183230704. The cubic root of 869749653 is about 954.5486945930.

The spelling of 869749653 in words is "eight hundred sixty-nine million, seven hundred forty-nine thousand, six hundred fifty-three".