71069961 has 4 divisors (see below), whose sum is σ = 94759952. Its totient is φ = 47379972.

The previous prime is 71069951. The next prime is 71069993. The reversal of 71069961 is 16996017.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 71069961 - 2⁷ = 71069833 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (71069951) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11844991 + ... + 11844996.

It is an arithmetic number, because the mean of its divisors is an integer number (23689988).

Almost surely, 2^71069961 is an apocalyptic number.

It is an amenable number.

71069961 is a deficient number, since it is larger than the sum of its proper divisors (23689991).

71069961 is a wasteful number, since it uses less digits than its factorization.

71069961 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23689990.

The product of its (nonzero) digits is 20412, while the sum is 39.

The square root of 71069961 is about 8430.3001725917. The cubic root of 71069961 is about 414.2177376890.

The spelling of 71069961 in words is "seventy-one million, sixty-nine thousand, nine hundred sixty-one".