275249987 has 2 divisors, whose sum is σ = 275249988. Its totient is φ = 275249986.

The previous prime is 275249977. The next prime is 275250007. The reversal of 275249987 is 789942572.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 275249987 - 2⁴ = 275249971 is a prime.

It is not a weakly prime, because it can be changed into another prime (275249917) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 137624993 + 137624994.

It is an arithmetic number, because the mean of its divisors is an integer number (137624994).

Almost surely, 2^275249987 is an apocalyptic number.

275249987 is a deficient number, since it is larger than the sum of its proper divisors (1).

275249987 is an equidigital number, since it uses as much as digits as its factorization.

275249987 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2540160, while the sum is 53.

The square root of 275249987 is about 16590.6596312504. The cubic root of 275249987 is about 650.4927128101.

The spelling of 275249987 in words is "two hundred seventy-five million, two hundred forty-nine thousand, nine hundred eighty-seven".