4187677381 has 2 divisors, whose sum is σ = 4187677382. Its totient is φ = 4187677380.

The previous prime is 4187677379. The next prime is 4187677391. The reversal of 4187677381 is 1837767814.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2700880900 + 1486796481 = 51970^2 + 38559^2 .

It is a cyclic number.

It is not a de Polignac number, because 4187677381 - 2¹ = 4187677379 is a prime.

It is a super-2 number, since 2×4187677381² = 35073283694678038322, which contains 22 as substring.

Together with 4187677379, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (4187677331) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2093838690 + 2093838691.

It is an arithmetic number, because the mean of its divisors is an integer number (2093838691).

Almost surely, 2^4187677381 is an apocalyptic number.

It is an amenable number.

4187677381 is a deficient number, since it is larger than the sum of its proper divisors (1).

4187677381 is an equidigital number, since it uses as much as digits as its factorization.

4187677381 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 4187677381 is about 64712.2660783873. The cubic root of 4187677381 is about 1611.8491902921.

The spelling of 4187677381 in words is "four billion, one hundred eighty-seven million, six hundred seventy-seven thousand, three hundred eighty-one".