3693881 has 2 divisors, whose sum is σ = 3693882. Its totient is φ = 3693880.

The previous prime is 3693863. The next prime is 3693883. The reversal of 3693881 is 1883963.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 3182656 + 511225 = 1784^2 + 715^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-3693881 is a prime.

It is a super-2 number, since 2×3693881² = 27289513684322, which contains 22 as substring.

Together with 3693883, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (3693883) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1846940 + 1846941.

It is an arithmetic number, because the mean of its divisors is an integer number (1846941).

Almost surely, 2^3693881 is an apocalyptic number.

It is an amenable number.

3693881 is a deficient number, since it is larger than the sum of its proper divisors (1).

3693881 is an equidigital number, since it uses as much as digits as its factorization.

3693881 is an evil number, because the sum of its binary digits is even.

The product of its digits is 31104, while the sum is 38.

The square root of 3693881 is about 1921.9471897011. The cubic root of 3693881 is about 154.5827278347.

The spelling of 3693881 in words is "three million, six hundred ninety-three thousand, eight hundred eighty-one".