850138253 has 2 divisors, whose sum is σ = 850138254. Its totient is φ = 850138252.

The previous prime is 850138249. The next prime is 850138283. The reversal of 850138253 is 352831058.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 844076809 + 6061444 = 29053^2 + 2462^2 .

It is a cyclic number.

It is not a de Polignac number, because 850138253 - 2² = 850138249 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (850138283) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 425069126 + 425069127.

It is an arithmetic number, because the mean of its divisors is an integer number (425069127).

Almost surely, 2^850138253 is an apocalyptic number.

It is an amenable number.

850138253 is a deficient number, since it is larger than the sum of its proper divisors (1).

850138253 is an equidigital number, since it uses as much as digits as its factorization.

850138253 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 28800, while the sum is 35.

The square root of 850138253 is about 29157.1303972116. The cubic root of 850138253 is about 947.3195923137.

It can be divided in two parts, 8501 and 38253, that multiplied together give a triangular number (325188753 = T₂₅₅₀₂).

The spelling of 850138253 in words is "eight hundred fifty million, one hundred thirty-eight thousand, two hundred fifty-three".