73791391 has 2 divisors, whose sum is σ = 73791392. Its totient is φ = 73791390.

The previous prime is 73791379. The next prime is 73791433. The reversal of 73791391 is 19319737.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 73791391 - 2¹¹ = 73789343 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (73791301) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36895695 + 36895696.

It is an arithmetic number, because the mean of its divisors is an integer number (36895696).

Almost surely, 2^73791391 is an apocalyptic number.

73791391 is a deficient number, since it is larger than the sum of its proper divisors (1).

73791391 is an equidigital number, since it uses as much as digits as its factorization.

73791391 is an evil number, because the sum of its binary digits is even.

The product of its digits is 35721, while the sum is 40.

The square root of 73791391 is about 8590.1915578176. The cubic root of 73791391 is about 419.4387647310.

The spelling of 73791391 in words is "seventy-three million, seven hundred ninety-one thousand, three hundred ninety-one".