71937949 has 4 divisors (see below), whose sum is σ = 74258560. Its totient is φ = 69617340.

The previous prime is 71937917. The next prime is 71937973. The reversal of 71937949 is 94973917.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 71937949 - 2⁵ = 71937917 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (71934949) 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, 1160259 + ... + 1160320.

It is an arithmetic number, because the mean of its divisors is an integer number (18564640).

Almost surely, 2^71937949 is an apocalyptic number.

It is an amenable number.

71937949 is a deficient number, since it is larger than the sum of its proper divisors (2320611).

71937949 is a wasteful number, since it uses less digits than its factorization.

71937949 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2320610.

The product of its digits is 428652, while the sum is 49.

The square root of 71937949 is about 8481.6241958719. The cubic root of 71937949 is about 415.8972198161.

The spelling of 71937949 in words is "seventy-one million, nine hundred thirty-seven thousand, nine hundred forty-nine".