851434149 has 4 divisors (see below), whose sum is σ = 1135245536. Its totient is φ = 567622764.

The previous prime is 851434147. The next prime is 851434159. The reversal of 851434149 is 941434158.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 851434149 - 2¹ = 851434147 is a prime.

It is a super-2 number, since 2×851434149² = 1449880220166708402, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (851434147) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 141905689 + ... + 141905694.

It is an arithmetic number, because the mean of its divisors is an integer number (283811384).

Almost surely, 2^851434149 is an apocalyptic number.

It is an amenable number.

851434149 is a deficient number, since it is larger than the sum of its proper divisors (283811387).

851434149 is a wasteful number, since it uses less digits than its factorization.

851434149 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 283811386.

The product of its digits is 69120, while the sum is 39.

The square root of 851434149 is about 29179.3445608362. The cubic root of 851434149 is about 947.8006922687.

Subtracting 851434149 from its reverse (941434158), we obtain a palindrome (90000009).

The spelling of 851434149 in words is "eight hundred fifty-one million, four hundred thirty-four thousand, one hundred forty-nine".