971509039 has 4 divisors (see below), whose sum is σ = 984817456. Its totient is φ = 958200624.

The previous prime is 971509009. The next prime is 971509061. The reversal of 971509039 is 930905179.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-971509039 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 971508986 and 971509004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (971509009) 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, 6654099 + ... + 6654244.

It is an arithmetic number, because the mean of its divisors is an integer number (246204364).

Almost surely, 2^971509039 is an apocalyptic number.

971509039 is a deficient number, since it is larger than the sum of its proper divisors (13308417).

971509039 is a wasteful number, since it uses less digits than its factorization.

971509039 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13308416.

The product of its (nonzero) digits is 76545, while the sum is 43.

The square root of 971509039 is about 31169.0397510093. The cubic root of 971509039 is about 990.4113649436.

The spelling of 971509039 in words is "nine hundred seventy-one million, five hundred nine thousand, thirty-nine".