71773949 has 16 divisors (see below), whose sum is σ = 82897920. Its totient is φ = 61551360.

The previous prime is 71773937. The next prime is 71773967. The reversal of 71773949 is 94937717.

It is not a de Polignac number, because 71773949 - 2⁸ = 71773693 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 (71773049) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 15404 + ... + 19514.

It is an arithmetic number, because the mean of its divisors is an integer number (5181120).

Almost surely, 2^71773949 is an apocalyptic number.

71773949 is a gapful number since it is divisible by the number (79) formed by its first and last digit.

It is an amenable number.

71773949 is a deficient number, since it is larger than the sum of its proper divisors (11123971).

71773949 is a wasteful number, since it uses less digits than its factorization.

71773949 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4220.

The product of its digits is 333396, while the sum is 47.

The square root of 71773949 is about 8471.9507198756. The cubic root of 71773949 is about 415.5809331537.

The spelling of 71773949 in words is "seventy-one million, seven hundred seventy-three thousand, nine hundred forty-nine".