73659991 has 2 divisors, whose sum is σ = 73659992. Its totient is φ = 73659990.

The previous prime is 73659967. The next prime is 73660009. The reversal of 73659991 is 19995637.

It is a strong prime.

It is an emirp because it is prime and its reverse (19995637) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 73659991 - 2⁵ = 73659959 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (73659931) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36829995 + 36829996.

It is an arithmetic number, because the mean of its divisors is an integer number (36829996).

Almost surely, 2^73659991 is an apocalyptic number.

73659991 is a deficient number, since it is larger than the sum of its proper divisors (1).

73659991 is an equidigital number, since it uses as much as digits as its factorization.

73659991 is an evil number, because the sum of its binary digits is even.

The product of its digits is 459270, while the sum is 49.

The square root of 73659991 is about 8582.5398921298. The cubic root of 73659991 is about 419.1896525638.

The spelling of 73659991 in words is "seventy-three million, six hundred fifty-nine thousand, nine hundred ninety-one".