87926789 has 2 divisors, whose sum is σ = 87926790. Its totient is φ = 87926788.

The previous prime is 87926767. The next prime is 87926791. The reversal of 87926789 is 98762978.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 85414564 + 2512225 = 9242^2 + 1585^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-87926789 is a prime.

It is a super-2 number, since 2×87926789² = 15462240447701042, which contains 22 as substring.

Together with 87926791, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (87926719) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43963394 + 43963395.

It is an arithmetic number, because the mean of its divisors is an integer number (43963395).

Almost surely, 2^87926789 is an apocalyptic number.

It is an amenable number.

87926789 is a deficient number, since it is larger than the sum of its proper divisors (1).

87926789 is an equidigital number, since it uses as much as digits as its factorization.

87926789 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3048192, while the sum is 56.

The square root of 87926789 is about 9376.9285483041. The cubic root of 87926789 is about 444.6726355536.

The spelling of 87926789 in words is "eighty-seven million, nine hundred twenty-six thousand, seven hundred eighty-nine".