72703691 has 2 divisors, whose sum is σ = 72703692. Its totient is φ = 72703690.

The previous prime is 72703597. The next prime is 72703699. The reversal of 72703691 is 19630727.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-72703691 is a prime.

It is a Chen prime.

It is equal to p_4267637 and since 72703691 and 4267637 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (72703699) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36351845 + 36351846.

It is an arithmetic number, because the mean of its divisors is an integer number (36351846).

Almost surely, 2^72703691 is an apocalyptic number.

72703691 is a deficient number, since it is larger than the sum of its proper divisors (1).

72703691 is an equidigital number, since it uses as much as digits as its factorization.

72703691 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 15876, while the sum is 35.

The square root of 72703691 is about 8526.6459408140. The cubic root of 72703691 is about 417.3676844142.

The spelling of 72703691 in words is "seventy-two million, seven hundred three thousand, six hundred ninety-one".