947961539 has 4 divisors (see below), whose sum is σ = 1083384624. Its totient is φ = 812538456.

The previous prime is 947961481. The next prime is 947961557. The reversal of 947961539 is 935169749.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 947961539 - 2²⁴ = 931184323 is a prime.

It is not an unprimeable number, because it can be changed into a prime (947961559) 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, 67711532 + ... + 67711545.

It is an arithmetic number, because the mean of its divisors is an integer number (270846156).

Almost surely, 2^947961539 is an apocalyptic number.

947961539 is a deficient number, since it is larger than the sum of its proper divisors (135423085).

947961539 is a wasteful number, since it uses less digits than its factorization.

947961539 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 135423084.

The product of its digits is 1837080, while the sum is 53.

The square root of 947961539 is about 30788.9840527420. The cubic root of 947961539 is about 982.3439447231.

The spelling of 947961539 in words is "nine hundred forty-seven million, nine hundred sixty-one thousand, five hundred thirty-nine".