87667511 has 2 divisors, whose sum is σ = 87667512. Its totient is φ = 87667510.

The previous prime is 87667507. The next prime is 87667519. The reversal of 87667511 is 11576678.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 87667511 - 2² = 87667507 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (87667519) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43833755 + 43833756.

It is an arithmetic number, because the mean of its divisors is an integer number (43833756).

Almost surely, 2^87667511 is an apocalyptic number.

87667511 is a deficient number, since it is larger than the sum of its proper divisors (1).

87667511 is an equidigital number, since it uses as much as digits as its factorization.

87667511 is an evil number, because the sum of its binary digits is even.

The product of its digits is 70560, while the sum is 41.

The square root of 87667511 is about 9363.0930252775. The cubic root of 87667511 is about 444.2351225390.

The spelling of 87667511 in words is "eighty-seven million, six hundred sixty-seven thousand, five hundred eleven".