71890707 has 8 divisors (see below), whose sum is σ = 109547776. Its totient is φ = 41080392.

The previous prime is 71890697. The next prime is 71890723. The reversal of 71890707 is 70709817.

It is a happy number.

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

It is not a de Polignac number, because 71890707 - 2¹² = 71886611 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (71890727) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1711663 + ... + 1711704.

It is an arithmetic number, because the mean of its divisors is an integer number (13693472).

Almost surely, 2^71890707 is an apocalyptic number.

71890707 is a deficient number, since it is larger than the sum of its proper divisors (37657069).

71890707 is a wasteful number, since it uses less digits than its factorization.

71890707 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3423377.

The product of its (nonzero) digits is 24696, while the sum is 39.

The square root of 71890707 is about 8478.8387766250. The cubic root of 71890707 is about 415.8061593062.

The spelling of 71890707 in words is "seventy-one million, eight hundred ninety thousand, seven hundred seven".