345678690887 has 2 divisors, whose sum is σ = 345678690888. Its totient is φ = 345678690886.

The previous prime is 345678690883. The next prime is 345678690901. The reversal of 345678690887 is 788096876543.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 345678690887 - 2² = 345678690883 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 345678690887.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (345678690883) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 172839345443 + 172839345444.

It is an arithmetic number, because the mean of its divisors is an integer number (172839345444).

Almost surely, 2^345678690887 is an apocalyptic number.

345678690887 is a deficient number, since it is larger than the sum of its proper divisors (1).

345678690887 is an equidigital number, since it uses as much as digits as its factorization.

345678690887 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 487710720, while the sum is 71.

The spelling of 345678690887 in words is "three hundred forty-five billion, six hundred seventy-eight million, six hundred ninety thousand, eight hundred eighty-seven".