969443638 has 4 divisors (see below), whose sum is σ = 1454165460. Its totient is φ = 484721818.

The previous prime is 969443633. The next prime is 969443653. The reversal of 969443638 is 836344969.

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

It is a super-3 number, since 3×969443638³ (a number of 28 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (969443633) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 242360908 + ... + 242360911.

It is an arithmetic number, because the mean of its divisors is an integer number (363541365).

Almost surely, 2^969443638 is an apocalyptic number.

969443638 is a deficient number, since it is larger than the sum of its proper divisors (484721822).

969443638 is a wasteful number, since it uses less digits than its factorization.

969443638 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 484721821.

The product of its digits is 3359232, while the sum is 52.

The square root of 969443638 is about 31135.8898700519. The cubic root of 969443638 is about 989.7090047037.

The spelling of 969443638 in words is "nine hundred sixty-nine million, four hundred forty-three thousand, six hundred thirty-eight".