245683891 has 2 divisors, whose sum is σ = 245683892. Its totient is φ = 245683890.

The previous prime is 245683883. The next prime is 245683937. The reversal of 245683891 is 198386542.

It is an a-pointer prime, because the next prime (245683937) can be obtained adding 245683891 to its sum of digits (46).

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 245683891 - 2³ = 245683883 is a prime.

It is not a weakly prime, because it can be changed into another prime (245683871) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 122841945 + 122841946.

It is an arithmetic number, because the mean of its divisors is an integer number (122841946).

Almost surely, 2^245683891 is an apocalyptic number.

245683891 is a deficient number, since it is larger than the sum of its proper divisors (1).

245683891 is an equidigital number, since it uses as much as digits as its factorization.

245683891 is an evil number, because the sum of its binary digits is even.

The product of its digits is 414720, while the sum is 46.

The square root of 245683891 is about 15674.3067151310. The cubic root of 245683891 is about 626.3141551772.

The spelling of 245683891 in words is "two hundred forty-five million, six hundred eighty-three thousand, eight hundred ninety-one".