3691018 has 4 divisors (see below), whose sum is σ = 5536530. Its totient is φ = 1845508.

The previous prime is 3691013. The next prime is 3691019. The reversal of 3691018 is 8101963.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 3674889 + 16129 = 1917^2 + 127^2 .

It is a super-2 number, since 2×3691018² = 27247227752648, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (3691013) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 922753 + ... + 922756.

Almost surely, 2^3691018 is an apocalyptic number.

3691018 is a deficient number, since it is larger than the sum of its proper divisors (1845512).

3691018 is a wasteful number, since it uses less digits than its factorization.

3691018 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1845511.

The product of its (nonzero) digits is 1296, while the sum is 28.

The square root of 3691018 is about 1921.2022277730. The cubic root of 3691018 is about 154.5427802620.

The spelling of 3691018 in words is "three million, six hundred ninety-one thousand, eighteen".