3661229987 has 2 divisors, whose sum is σ = 3661229988. Its totient is φ = 3661229986.

The previous prime is 3661229981. The next prime is 3661229993. The reversal of 3661229987 is 7899221663.

It is a happy number.

It is a balanced prime because it is at equal distance from previous prime (3661229981) and next prime (3661229993).

It is a cyclic number.

It is not a de Polignac number, because 3661229987 - 2²⁴ = 3644452771 is a prime.

It is not a weakly prime, because it can be changed into another prime (3661229981) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1830614993 + 1830614994.

It is an arithmetic number, because the mean of its divisors is an integer number (1830614994).

Almost surely, 2^3661229987 is an apocalyptic number.

3661229987 is a deficient number, since it is larger than the sum of its proper divisors (1).

3661229987 is an equidigital number, since it uses as much as digits as its factorization.

3661229987 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1959552, while the sum is 53.

The square root of 3661229987 is about 60508.0985240819. The cubic root of 3661229987 is about 1541.2591583863.

The spelling of 3661229987 in words is "three billion, six hundred sixty-one million, two hundred twenty-nine thousand, nine hundred eighty-seven".