3991828501 has 2 divisors, whose sum is σ = 3991828502. Its totient is φ = 3991828500.

The previous prime is 3991828493. The next prime is 3991828537. The reversal of 3991828501 is 1058281993.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 3990954276 + 874225 = 63174^2 + 935^2 .

It is a cyclic number.

It is not a de Polignac number, because 3991828501 - 2³ = 3991828493 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3991828591) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1995914250 + 1995914251.

It is an arithmetic number, because the mean of its divisors is an integer number (1995914251).

Almost surely, 2^3991828501 is an apocalyptic number.

It is an amenable number.

3991828501 is a deficient number, since it is larger than the sum of its proper divisors (1).

3991828501 is an equidigital number, since it uses as much as digits as its factorization.

3991828501 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 155520, while the sum is 46.

The square root of 3991828501 is about 63180.9188046518. The cubic root of 3991828501 is about 1586.3193612048.

The spelling of 3991828501 in words is "three billion, nine hundred ninety-one million, eight hundred twenty-eight thousand, five hundred one".