80642693 has 2 divisors, whose sum is σ = 80642694. Its totient is φ = 80642692.

The previous prime is 80642689. The next prime is 80642699. The reversal of 80642693 is 39624608.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 58721569 + 21921124 = 7663^2 + 4682^2 .

It is a cyclic number.

It is not a de Polignac number, because 80642693 - 2² = 80642689 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (80642699) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 40321346 + 40321347.

It is an arithmetic number, because the mean of its divisors is an integer number (40321347).

Almost surely, 2^80642693 is an apocalyptic number.

It is an amenable number.

80642693 is a deficient number, since it is larger than the sum of its proper divisors (1).

80642693 is an equidigital number, since it uses as much as digits as its factorization.

80642693 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 62208, while the sum is 38.

The square root of 80642693 is about 8980.1276716982. The cubic root of 80642693 is about 432.0377285436.

The spelling of 80642693 in words is "eighty million, six hundred forty-two thousand, six hundred ninety-three".