71941949 has 4 divisors (see below), whose sum is σ = 73886364. Its totient is φ = 69997536.

The previous prime is 71941937. The next prime is 71941963. The reversal of 71941949 is 94914917.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 94914917 = 6073 ⋅15629.

It can be written as a sum of positive squares in 2 ways, for example, as 55279225 + 16662724 = 7435^2 + 4082^2 .

It is a cyclic number.

It is not a de Polignac number, because 71941949 - 2⁸ = 71941693 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (71941249) 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, 972152 + ... + 972225.

It is an arithmetic number, because the mean of its divisors is an integer number (18471591).

Almost surely, 2^71941949 is an apocalyptic number.

It is an amenable number.

71941949 is a deficient number, since it is larger than the sum of its proper divisors (1944415).

71941949 is a wasteful number, since it uses less digits than its factorization.

71941949 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1944414.

The product of its digits is 81648, while the sum is 44.

The square root of 71941949 is about 8481.8599964866. The cubic root of 71941949 is about 415.9049281169.

The spelling of 71941949 in words is "seventy-one million, nine hundred forty-one thousand, nine hundred forty-nine".