73980691 has 2 divisors, whose sum is σ = 73980692. Its totient is φ = 73980690.

The previous prime is 73980659. The next prime is 73980701. The reversal of 73980691 is 19608937.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 73980691 - 2⁵ = 73980659 is a prime.

It is not a weakly prime, because it can be changed into another prime (73980611) 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 as a sum of consecutive naturals, namely, 36990345 + 36990346.

It is an arithmetic number, because the mean of its divisors is an integer number (36990346).

Almost surely, 2^73980691 is an apocalyptic number.

73980691 is a deficient number, since it is larger than the sum of its proper divisors (1).

73980691 is an equidigital number, since it uses as much as digits as its factorization.

73980691 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 81648, while the sum is 43.

The square root of 73980691 is about 8601.2028809929. The cubic root of 73980691 is about 419.7971261329.

The spelling of 73980691 in words is "seventy-three million, nine hundred eighty thousand, six hundred ninety-one".