71912949 has 8 divisors (see below), whose sum is σ = 96286080. Its totient is φ = 47740896.

The previous prime is 71912947. The next prime is 71912983. The reversal of 71912949 is 94921917.

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

It is not a de Polignac number, because 71912949 - 2¹ = 71912947 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 71912949.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (71912947) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 49432 + ... + 50865.

It is an arithmetic number, because the mean of its divisors is an integer number (12035760).

Almost surely, 2^71912949 is an apocalyptic number.

It is an amenable number.

71912949 is a deficient number, since it is larger than the sum of its proper divisors (24373131).

71912949 is a wasteful number, since it uses less digits than its factorization.

71912949 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 100539.

The product of its digits is 40824, while the sum is 42.

The square root of 71912949 is about 8480.1502934795. The cubic root of 71912949 is about 415.8490364613.

The spelling of 71912949 in words is "seventy-one million, nine hundred twelve thousand, nine hundred forty-nine".