869451938 has 4 divisors (see below), whose sum is σ = 1304177910. Its totient is φ = 434725968.

The previous prime is 869451923. The next prime is 869451953. The reversal of 869451938 is 839154968.

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

It is an interprime number because it is at equal distance from previous prime (869451923) and next prime (869451953).

It can be written as a sum of positive squares in only one way, i.e., 640444249 + 229007689 = 25307^2 + 15133^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 869451938.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 217362983 + ... + 217362986.

Almost surely, 2^869451938 is an apocalyptic number.

869451938 is a deficient number, since it is larger than the sum of its proper divisors (434725972).

869451938 is a wasteful number, since it uses less digits than its factorization.

869451938 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 434725971.

The product of its digits is 1866240, while the sum is 53.

The square root of 869451938 is about 29486.4704228906. The cubic root of 869451938 is about 954.4397682695.

The spelling of 869451938 in words is "eight hundred sixty-nine million, four hundred fifty-one thousand, nine hundred thirty-eight".