71290079 has 4 divisors (see below), whose sum is σ = 81474384. Its totient is φ = 61105776.

The previous prime is 71290057. The next prime is 71290099. The reversal of 71290079 is 97009217.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 97009217 = 71 ⋅1366327.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-71290079 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (71290039) 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, 5092142 + ... + 5092155.

It is an arithmetic number, because the mean of its divisors is an integer number (20368596).

Almost surely, 2^71290079 is an apocalyptic number.

71290079 is a deficient number, since it is larger than the sum of its proper divisors (10184305).

71290079 is a wasteful number, since it uses less digits than its factorization.

71290079 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10184304.

The product of its (nonzero) digits is 7938, while the sum is 35.

The square root of 71290079 is about 8443.3452493665. The cubic root of 71290079 is about 414.6449355720.

The spelling of 71290079 in words is "seventy-one million, two hundred ninety thousand, seventy-nine".