947669638 has 8 divisors (see below), whose sum is σ = 1421712360. Its totient is φ = 473765520.

The previous prime is 947669633. The next prime is 947669677. The reversal of 947669638 is 836966749.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (947669633) 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, 15423 + ... + 46186.

It is an arithmetic number, because the mean of its divisors is an integer number (177714045).

Almost surely, 2^947669638 is an apocalyptic number.

947669638 is a deficient number, since it is larger than the sum of its proper divisors (474042722).

947669638 is a wasteful number, since it uses less digits than its factorization.

947669638 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 69302.

The product of its digits is 11757312, while the sum is 58.

The square root of 947669638 is about 30784.2433397347. The cubic root of 947669638 is about 982.2431049720.

The spelling of 947669638 in words is "nine hundred forty-seven million, six hundred sixty-nine thousand, six hundred thirty-eight".