3688616989 has 2 divisors, whose sum is σ = 3688616990. Its totient is φ = 3688616988.

The previous prime is 3688616903. The next prime is 3688617017. The reversal of 3688616989 is 9896168863.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 3443694489 + 244922500 = 58683^2 + 15650^2 .

It is a cyclic number.

It is not a de Polignac number, because 3688616989 - 2¹⁹ = 3688092701 is a prime.

It is a super-2 number, since 2×3688616989² = 27211790583078852242, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 3688616989.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3688616689) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1844308494 + 1844308495.

It is an arithmetic number, because the mean of its divisors is an integer number (1844308495).

Almost surely, 2^3688616989 is an apocalyptic number.

It is an amenable number.

3688616989 is a deficient number, since it is larger than the sum of its proper divisors (1).

3688616989 is an equidigital number, since it uses as much as digits as its factorization.

3688616989 is an evil number, because the sum of its binary digits is even.

The product of its digits is 26873856, while the sum is 64.

The square root of 3688616989 is about 60733.9854529571. The cubic root of 3688616989 is about 1545.0926291416.

The spelling of 3688616989 in words is "three billion, six hundred eighty-eight million, six hundred sixteen thousand, nine hundred eighty-nine".