76946021 has 2 divisors, whose sum is σ = 76946022. Its totient is φ = 76946020.

The previous prime is 76945997. The next prime is 76946027. The reversal of 76946021 is 12064967.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 67404100 + 9541921 = 8210^2 + 3089^2 .

It is an emirp because it is prime and its reverse (12064967) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 76946021 - 2¹⁰ = 76944997 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (76946027) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 38473010 + 38473011.

It is an arithmetic number, because the mean of its divisors is an integer number (38473011).

Almost surely, 2^76946021 is an apocalyptic number.

It is an amenable number.

76946021 is a deficient number, since it is larger than the sum of its proper divisors (1).

76946021 is an equidigital number, since it uses as much as digits as its factorization.

76946021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 18144, while the sum is 35.

The square root of 76946021 is about 8771.8881091815. Note that the first 3 decimals coincide. The cubic root of 76946021 is about 425.3326502911.

The spelling of 76946021 in words is "seventy-six million, nine hundred forty-six thousand, twenty-one".