869945769 has 24 divisors (see below), whose sum is σ = 1566656832. Its totient is φ = 451919520.

The previous prime is 869945729. The next prime is 869945789. The reversal of 869945769 is 967549968.

It is a happy number.

It is a de Polignac number, because none of the positive numbers 2^k-869945769 is a prime.

It is a super-2 number, since 2×869945769² = 1513611282002002722, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (63).

It is not an unprimeable number, because it can be changed into a prime (869945729) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 626974 + ... + 628359.

It is an arithmetic number, because the mean of its divisors is an integer number (65277368).

Almost surely, 2^869945769 is an apocalyptic number.

It is an amenable number.

869945769 is a deficient number, since it is larger than the sum of its proper divisors (696711063).

869945769 is a wasteful number, since it uses less digits than its factorization.

869945769 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1255357 (or 1255354 counting only the distinct ones).

The product of its digits is 29393280, while the sum is 63.

The square root of 869945769 is about 29494.8430916321. The cubic root of 869945769 is about 954.6204348547.

The spelling of 869945769 in words is "eight hundred sixty-nine million, nine hundred forty-five thousand, seven hundred sixty-nine".