830187381 has 4 divisors (see below), whose sum is σ = 1106916512. Its totient is φ = 553458252.

The previous prime is 830187373. The next prime is 830187431. The reversal of 830187381 is 183781038.

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 830187381 - 2³ = 830187373 is a prime.

It is a super-2 number, since 2×830187381² = 1378422175143278322, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (830187361) 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, 138364561 + ... + 138364566.

It is an arithmetic number, because the mean of its divisors is an integer number (276729128).

Almost surely, 2^830187381 is an apocalyptic number.

It is an amenable number.

830187381 is a deficient number, since it is larger than the sum of its proper divisors (276729131).

830187381 is a wasteful number, since it uses less digits than its factorization.

830187381 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 276729130.

The product of its (nonzero) digits is 32256, while the sum is 39.

The square root of 830187381 is about 28812.9724429813. The cubic root of 830187381 is about 939.8503537997.

The spelling of 830187381 in words is "eight hundred thirty million, one hundred eighty-seven thousand, three hundred eighty-one".