3990986551 has 2 divisors, whose sum is σ = 3990986552. Its totient is φ = 3990986550.

The previous prime is 3990986507. The next prime is 3990986561. The reversal of 3990986551 is 1556890993.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-3990986551 is a prime.

It is a super-4 number, since 4×3990986551⁴ (a number of 40 digits) contains 4444 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 3990986492 and 3990986501.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3990986561) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1995493275 + 1995493276.

It is an arithmetic number, because the mean of its divisors is an integer number (1995493276).

Almost surely, 2^3990986551 is an apocalyptic number.

3990986551 is a deficient number, since it is larger than the sum of its proper divisors (1).

3990986551 is an equidigital number, since it uses as much as digits as its factorization.

3990986551 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2624400, while the sum is 55.

The square root of 3990986551 is about 63174.2554447617. The cubic root of 3990986551 is about 1586.2078253929.

The spelling of 3990986551 in words is "three billion, nine hundred ninety million, nine hundred eighty-six thousand, five hundred fifty-one".