3618631 has 2 divisors, whose sum is σ = 3618632. Its totient is φ = 3618630.

The previous prime is 3618583. The next prime is 3618653. The reversal of 3618631 is 1368163.

It is a strong prime.

It is an emirp because it is prime and its reverse (1368163) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 3618631 - 2¹¹ = 3616583 is a prime.

It is a super-2 number, since 2×3618631² = 26188980628322, which contains 22 as substring.

3618631 is a lucky number.

It is a self number, because there is not a number n which added to its sum of digits gives 3618631.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3628631) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1809315 + 1809316.

It is an arithmetic number, because the mean of its divisors is an integer number (1809316).

Almost surely, 2^3618631 is an apocalyptic number.

3618631 is a deficient number, since it is larger than the sum of its proper divisors (1).

3618631 is an equidigital number, since it uses as much as digits as its factorization.

3618631 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2592, while the sum is 28.

The square root of 3618631 is about 1902.2699598112. The cubic root of 3618631 is about 153.5258226318.

The spelling of 3618631 in words is "three million, six hundred eighteen thousand, six hundred thirty-one".