3968551 has 2 divisors, whose sum is σ = 3968552. Its totient is φ = 3968550.

The previous prime is 3968543. The next prime is 3968567. The reversal of 3968551 is 1558693.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 3968551 - 2³ = 3968543 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 3968551.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3968501) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1984275 + 1984276.

It is an arithmetic number, because the mean of its divisors is an integer number (1984276).

Almost surely, 2^3968551 is an apocalyptic number.

3968551 is a deficient number, since it is larger than the sum of its proper divisors (1).

3968551 is an equidigital number, since it uses as much as digits as its factorization.

3968551 is an evil number, because the sum of its binary digits is even.

The product of its digits is 32400, while the sum is 37.

The square root of 3968551 is about 1992.1222352055. The cubic root of 3968551 is about 158.3229919993.

The spelling of 3968551 in words is "three million, nine hundred sixty-eight thousand, five hundred fifty-one".