76721943 has 16 divisors (see below), whose sum is σ = 107866880. Its totient is φ = 48371904.

The previous prime is 76721917. The next prime is 76721999. The reversal of 76721943 is 34912767.

It is not a de Polignac number, because 76721943 - 2⁹ = 76721431 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 (76721903) 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, 58230 + ... + 59532.

It is an arithmetic number, because the mean of its divisors is an integer number (6741680).

Almost surely, 2^76721943 is an apocalyptic number.

76721943 is a deficient number, since it is larger than the sum of its proper divisors (31144937).

76721943 is a wasteful number, since it uses less digits than its factorization.

76721943 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2358.

The product of its digits is 63504, while the sum is 39.

The square root of 76721943 is about 8759.1062900275. The cubic root of 76721943 is about 424.9193720174.

The spelling of 76721943 in words is "seventy-six million, seven hundred twenty-one thousand, nine hundred forty-three".