71899474 has 4 divisors (see below), whose sum is σ = 107849214. Its totient is φ = 35949736.

The previous prime is 71899469. The next prime is 71899493. The reversal of 71899474 is 47499817.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 67125249 + 4774225 = 8193^2 + 2185^2 .

It is a super-2 number, since 2×71899474² = 10339068722953352, which contains 22 as substring.

It is a Smith number, since the sum of its digits (49) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 17974867 + ... + 17974870.

Almost surely, 2^71899474 is an apocalyptic number.

71899474 is a deficient number, since it is larger than the sum of its proper divisors (35949740).

71899474 is a wasteful number, since it uses less digits than its factorization.

71899474 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35949739.

The product of its digits is 508032, while the sum is 49.

The square root of 71899474 is about 8479.3557538294. The cubic root of 71899474 is about 415.8230610012.

The spelling of 71899474 in words is "seventy-one million, eight hundred ninety-nine thousand, four hundred seventy-four".