3908623213549 has 2 divisors, whose sum is σ = 3908623213550. Its totient is φ = 3908623213548.

The previous prime is 3908623213507. The next prime is 3908623213633. The reversal of 3908623213549 is 9453123268093.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2635151589225 + 1273471624324 = 1623315^2 + 1128482^2 .

It is a cyclic number.

It is not a de Polignac number, because 3908623213549 - 2²⁹ = 3908086342637 is a prime.

It is a super-2 number, since 2×3908623213549² (a number of 26 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 3908623213549.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3908603213549) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1954311606774 + 1954311606775.

It is an arithmetic number, because the mean of its divisors is an integer number (1954311606775).

Almost surely, 2^{3908623213549} is an apocalyptic number.

It is an amenable number.

3908623213549 is a deficient number, since it is larger than the sum of its proper divisors (1).

3908623213549 is an equidigital number, since it uses as much as digits as its factorization.

3908623213549 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 8398080, while the sum is 55.

The spelling of 3908623213549 in words is "three trillion, nine hundred eight billion, six hundred twenty-three million, two hundred thirteen thousand, five hundred forty-nine".