71950091 has 4 divisors (see below), whose sum is σ = 73480992. Its totient is φ = 70419192.

The previous prime is 71950061. The next prime is 71950133. The reversal of 71950091 is 19005917.

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 71950091 - 2¹⁴ = 71933707 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (71950031) 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, 765380 + ... + 765473.

It is an arithmetic number, because the mean of its divisors is an integer number (18370248).

Almost surely, 2^71950091 is an apocalyptic number.

71950091 is a deficient number, since it is larger than the sum of its proper divisors (1530901).

71950091 is a wasteful number, since it uses less digits than its factorization.

71950091 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1530900.

The product of its (nonzero) digits is 2835, while the sum is 32.

The square root of 71950091 is about 8482.3399483869. The cubic root of 71950091 is about 415.9206174805.

The spelling of 71950091 in words is "seventy-one million, nine hundred fifty thousand, ninety-one".