262678987 has 2 divisors, whose sum is σ = 262678988. Its totient is φ = 262678986.

The previous prime is 262678967. The next prime is 262679051. The reversal of 262678987 is 789876262.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 262678987 - 2⁷ = 262678859 is a prime.

It is a super-2 number, since 2×262678987² = 138000500422692338, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (262678907) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 131339493 + 131339494.

It is an arithmetic number, because the mean of its divisors is an integer number (131339494).

Almost surely, 2^262678987 is an apocalyptic number.

262678987 is a deficient number, since it is larger than the sum of its proper divisors (1).

262678987 is an equidigital number, since it uses as much as digits as its factorization.

262678987 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 4064256, while the sum is 55.

The square root of 262678987 is about 16207.3744634965. The cubic root of 262678987 is about 640.4350776984.

The spelling of 262678987 in words is "two hundred sixty-two million, six hundred seventy-eight thousand, nine hundred eighty-seven".