3620989 has 2 divisors, whose sum is σ = 3620990. Its totient is φ = 3620988.

The previous prime is 3620977. The next prime is 3620993. The reversal of 3620989 is 9890263.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2377764 + 1243225 = 1542^2 + 1115^2 .

It is an emirp because it is prime and its reverse (9890263) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 3620989 - 2⁵ = 3620957 is a prime.

It is a super-2 number, since 2×3620989² = 26223122676242, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3620909) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1810494 + 1810495.

It is an arithmetic number, because the mean of its divisors is an integer number (1810495).

Almost surely, 2^3620989 is an apocalyptic number.

It is an amenable number.

3620989 is a deficient number, since it is larger than the sum of its proper divisors (1).

3620989 is an equidigital number, since it uses as much as digits as its factorization.

3620989 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 23328, while the sum is 37.

The square root of 3620989 is about 1902.8896447246. The cubic root of 3620989 is about 153.5591626145.

It can be divided in two parts, 36 and 20989, that added together give a square (21025 = 145²).

The spelling of 3620989 in words is "three million, six hundred twenty thousand, nine hundred eighty-nine".