249341987 has 2 divisors, whose sum is σ = 249341988. Its totient is φ = 249341986.

The previous prime is 249341977. The next prime is 249341999. The reversal of 249341987 is 789143942.

249341987 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 249341987 - 2¹⁴ = 249325603 is a prime.

It is a super-2 number, since 2×249341987² = 124342852962216338, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (249341977) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 124670993 + 124670994.

It is an arithmetic number, because the mean of its divisors is an integer number (124670994).

Almost surely, 2^249341987 is an apocalyptic number.

249341987 is a deficient number, since it is larger than the sum of its proper divisors (1).

249341987 is an equidigital number, since it uses as much as digits as its factorization.

249341987 is an evil number, because the sum of its binary digits is even.

The product of its digits is 435456, while the sum is 47.

The square root of 249341987 is about 15790.5663926282. The cubic root of 249341987 is about 629.4073430421.

The spelling of 249341987 in words is "two hundred forty-nine million, three hundred forty-one thousand, nine hundred eighty-seven".