71149894 has 4 divisors (see below), whose sum is σ = 106724844. Its totient is φ = 35574946.

The previous prime is 71149877. The next prime is 71149901. The reversal of 71149894 is 49894117.

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

It is a super-2 number, since 2×71149894² = 10124614832422472, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 71149894.

It is a congruent number.

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 17787472 + ... + 17787475.

It is an arithmetic number, because the mean of its divisors is an integer number (26681211).

Almost surely, 2^71149894 is an apocalyptic number.

71149894 is a deficient number, since it is larger than the sum of its proper divisors (35574950).

71149894 is a wasteful number, since it uses less digits than its factorization.

71149894 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35574949.

The product of its digits is 72576, while the sum is 43.

The square root of 71149894 is about 8435.0396561012. The cubic root of 71149894 is about 414.3729709305.

It can be divided in two parts, 711 and 49894, that added together give a palindrome (50605).

The spelling of 71149894 in words is "seventy-one million, one hundred forty-nine thousand, eight hundred ninety-four".