245683987 has 2 divisors, whose sum is σ = 245683988. Its totient is φ = 245683986.

The previous prime is 245683961. The next prime is 245684009. The reversal of 245683987 is 789386542.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 245683987 - 2⁷ = 245683859 is a prime.

It is a super-3 number, since 3×245683987³ (a number of 26 digits) contains 333 as substring.

It is not a weakly prime, because it can be changed into another prime (245683937) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 122841993 + 122841994.

It is an arithmetic number, because the mean of its divisors is an integer number (122841994).

Almost surely, 2^245683987 is an apocalyptic number.

245683987 is a deficient number, since it is larger than the sum of its proper divisors (1).

245683987 is an equidigital number, since it uses as much as digits as its factorization.

245683987 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2903040, while the sum is 52.

The square root of 245683987 is about 15674.3097774671. The cubic root of 245683987 is about 626.3142367538.

The spelling of 245683987 in words is "two hundred forty-five million, six hundred eighty-three thousand, nine hundred eighty-seven".