87726791 has 2 divisors, whose sum is σ = 87726792. Its totient is φ = 87726790.

The previous prime is 87726787. The next prime is 87726809. The reversal of 87726791 is 19762778.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 87726791 - 2² = 87726787 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (87726091) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43863395 + 43863396.

It is an arithmetic number, because the mean of its divisors is an integer number (43863396).

Almost surely, 2^87726791 is an apocalyptic number.

87726791 is a deficient number, since it is larger than the sum of its proper divisors (1).

87726791 is an equidigital number, since it uses as much as digits as its factorization.

87726791 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 296352, while the sum is 47.

The square root of 87726791 is about 9366.2581109000. The cubic root of 87726791 is about 444.3352292731.

The spelling of 87726791 in words is "eighty-seven million, seven hundred twenty-six thousand, seven hundred ninety-one".