71891002 has 8 divisors (see below), whose sum is σ = 109871316. Its totient is φ = 35267232.

The previous prime is 71890993. The next prime is 71891009. The reversal of 71891002 is 20019817.

It can be written as a sum of positive squares in 2 ways, for example, as 68574961 + 3316041 = 8281^2 + 1821^2 .

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

It is not an unprimeable number, because it can be changed into a prime (71891009) 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, 339003 + ... + 339214.

Almost surely, 2^71891002 is an apocalyptic number.

71891002 is a deficient number, since it is larger than the sum of its proper divisors (37980314).

71891002 is a wasteful number, since it uses less digits than its factorization.

71891002 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 678272.

The product of its (nonzero) digits is 1008, while the sum is 28.

The square root of 71891002 is about 8478.8561728573. The cubic root of 71891002 is about 415.8067280521.

The spelling of 71891002 in words is "seventy-one million, eight hundred ninety-one thousand, two".