3621139 has 2 divisors, whose sum is σ = 3621140. Its totient is φ = 3621138.

The previous prime is 3621127. The next prime is 3621157. The reversal of 3621139 is 9311263.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 3621139 - 2⁷ = 3621011 is a prime.

It is a super-2 number, since 2×3621139² = 26225295314642, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (3621199) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1810569 + 1810570.

It is an arithmetic number, because the mean of its divisors is an integer number (1810570).

Almost surely, 2^3621139 is an apocalyptic number.

3621139 is a deficient number, since it is larger than the sum of its proper divisors (1).

3621139 is an equidigital number, since it uses as much as digits as its factorization.

3621139 is an evil number, because the sum of its binary digits is even.

The product of its digits is 972, while the sum is 25.

The square root of 3621139 is about 1902.9290580576. The cubic root of 3621139 is about 153.5612829889.

The spelling of 3621139 in words is "three million, six hundred twenty-one thousand, one hundred thirty-nine".