139854851 has 2 divisors, whose sum is σ = 139854852. Its totient is φ = 139854850.

The previous prime is 139854829. The next prime is 139854853. The reversal of 139854851 is 158458931.

It is a strong prime.

It is an emirp because it is prime and its reverse (158458931) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-139854851 is a prime.

Together with 139854853, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (139854853) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 69927425 + 69927426.

It is an arithmetic number, because the mean of its divisors is an integer number (69927426).

Almost surely, 2^139854851 is an apocalyptic number.

139854851 is a deficient number, since it is larger than the sum of its proper divisors (1).

139854851 is an equidigital number, since it uses as much as digits as its factorization.

139854851 is an evil number, because the sum of its binary digits is even.

The product of its digits is 172800, while the sum is 44.

The square root of 139854851 is about 11826.0243108155. The cubic root of 139854851 is about 519.0698992459.

The spelling of 139854851 in words is "one hundred thirty-nine million, eight hundred fifty-four thousand, eight hundred fifty-one".