73949188091 has 2 divisors, whose sum is σ = 73949188092. Its totient is φ = 73949188090.

The previous prime is 73949188081. The next prime is 73949188133. The reversal of 73949188091 is 19088194937.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-73949188091 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 73949188091.

It is not a weakly prime, because it can be changed into another prime (73949188021) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36974594045 + 36974594046.

It is an arithmetic number, because the mean of its divisors is an integer number (36974594046).

Almost surely, 2^73949188091 is an apocalyptic number.

73949188091 is a deficient number, since it is larger than the sum of its proper divisors (1).

73949188091 is an equidigital number, since it uses as much as digits as its factorization.

73949188091 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3919104, while the sum is 59.

The spelling of 73949188091 in words is "seventy-three billion, nine hundred forty-nine million, one hundred eighty-eight thousand, ninety-one".