861351093 has 24 divisors (see below), whose sum is σ = 1272480768. Its totient is φ = 561205152.

The previous prime is 861351079. The next prime is 861351131. The reversal of 861351093 is 390153168.

It is a happy number.

It is not a de Polignac number, because 861351093 - 2¹³ = 861342901 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (861351013) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 471580 + ... + 473402.

It is an arithmetic number, because the mean of its divisors is an integer number (53020032).

Almost surely, 2^861351093 is an apocalyptic number.

It is an amenable number.

861351093 is a deficient number, since it is larger than the sum of its proper divisors (411129675).

861351093 is a wasteful number, since it uses less digits than its factorization.

861351093 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2993 (or 2990 counting only the distinct ones).

The product of its (nonzero) digits is 19440, while the sum is 36.

The square root of 861351093 is about 29348.7835011947. The cubic root of 861351093 is about 951.4662834291.

The spelling of 861351093 in words is "eight hundred sixty-one million, three hundred fifty-one thousand, ninety-three".