873787381 has 2 divisors, whose sum is σ = 873787382. Its totient is φ = 873787380.

The previous prime is 873787361. The next prime is 873787399. The reversal of 873787381 is 183787378.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 873734481 + 52900 = 29559^2 + 230^2 .

It is a cyclic number.

It is not a de Polignac number, because 873787381 - 2²¹ = 871690229 is a prime.

It is a super-2 number, since 2×873787381² = 1527008774389678322, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (873787351) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 436893690 + 436893691.

It is an arithmetic number, because the mean of its divisors is an integer number (436893691).

Almost surely, 2^873787381 is an apocalyptic number.

It is an amenable number.

873787381 is a deficient number, since it is larger than the sum of its proper divisors (1).

873787381 is an equidigital number, since it uses as much as digits as its factorization.

873787381 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1580544, while the sum is 52.

The square root of 873787381 is about 29559.8948069847. The cubic root of 873787381 is about 956.0235477501.

The spelling of 873787381 in words is "eight hundred seventy-three million, seven hundred eighty-seven thousand, three hundred eighty-one".