3620681 has 2 divisors, whose sum is σ = 3620682. Its totient is φ = 3620680.

The previous prime is 3620671. The next prime is 3620689. The reversal of 3620681 is 1860263.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2839225 + 781456 = 1685^2 + 884^2 .

It is a cyclic number.

It is not a de Polignac number, because 3620681 - 2¹⁴ = 3604297 is a prime.

It is a super-2 number, since 2×3620681² = 26218661807522, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 3620681.

It is not a weakly prime, because it can be changed into another prime (3620689) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1810340 + 1810341.

It is an arithmetic number, because the mean of its divisors is an integer number (1810341).

Almost surely, 2^3620681 is an apocalyptic number.

It is an amenable number.

3620681 is a deficient number, since it is larger than the sum of its proper divisors (1).

3620681 is an equidigital number, since it uses as much as digits as its factorization.

3620681 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1728, while the sum is 26.

The square root of 3620681 is about 1902.8087134549. The cubic root of 3620681 is about 153.5548085957.

The spelling of 3620681 in words is "three million, six hundred twenty thousand, six hundred eighty-one".