262139999987 has 2 divisors, whose sum is σ = 262139999988. Its totient is φ = 262139999986.

The previous prime is 262139999977. The next prime is 262140000011. The reversal of 262139999987 is 789999931262.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 262139999987 - 2³² = 257845032691 is a prime.

It is not a weakly prime, because it can be changed into another prime (262139999917) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 131069999993 + 131069999994.

It is an arithmetic number, because the mean of its divisors is an integer number (131069999994).

Almost surely, 2^262139999987 is an apocalyptic number.

262139999987 is a deficient number, since it is larger than the sum of its proper divisors (1).

262139999987 is an equidigital number, since it uses as much as digits as its factorization.

262139999987 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 238085568, while the sum is 74.

The spelling of 262139999987 in words is "two hundred sixty-two billion, one hundred thirty-nine million, nine hundred ninety-nine thousand, nine hundred eighty-seven".