71980773 has 4 divisors (see below), whose sum is σ = 95974368. Its totient is φ = 47987180.

The previous prime is 71980763. The next prime is 71980801. The reversal of 71980773 is 37708917.

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 71980773 - 2⁶ = 71980709 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (71980763) by changing a digit.

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 in 3 ways as a sum of consecutive naturals, for example, 11996793 + ... + 11996798.

It is an arithmetic number, because the mean of its divisors is an integer number (23993592).

Almost surely, 2^71980773 is an apocalyptic number.

It is an amenable number.

71980773 is a deficient number, since it is larger than the sum of its proper divisors (23993595).

71980773 is a wasteful number, since it uses less digits than its factorization.

71980773 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23993594.

The product of its (nonzero) digits is 74088, while the sum is 42.

The square root of 71980773 is about 8484.1483367513. The cubic root of 71980773 is about 415.9797300435.

The spelling of 71980773 in words is "seventy-one million, nine hundred eighty thousand, seven hundred seventy-three".