82979887 has 2 divisors, whose sum is σ = 82979888. Its totient is φ = 82979886.

The previous prime is 82979881. The next prime is 82979909. The reversal of 82979887 is 78897928.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 82979887 - 2³ = 82979879 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 (82979881) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 41489943 + 41489944.

It is an arithmetic number, because the mean of its divisors is an integer number (41489944).

Almost surely, 2^82979887 is an apocalyptic number.

82979887 is a deficient number, since it is larger than the sum of its proper divisors (1).

82979887 is an equidigital number, since it uses as much as digits as its factorization.

82979887 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4064256, while the sum is 58.

The square root of 82979887 is about 9109.3296679833. The cubic root of 82979887 is about 436.1718296294.

The spelling of 82979887 in words is "eighty-two million, nine hundred seventy-nine thousand, eight hundred eighty-seven".