3919999997 has 2 divisors, whose sum is σ = 3919999998. Its totient is φ = 3919999996.

The previous prime is 3919999883. The next prime is 3920000011. The reversal of 3919999997 is 7999999193.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 3895507396 + 24492601 = 62414^2 + 4949^2 .

It is a cyclic number.

It is not a de Polignac number, because 3919999997 - 2¹² = 3919995901 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3919999297) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1959999998 + 1959999999.

It is an arithmetic number, because the mean of its divisors is an integer number (1959999999).

Almost surely, 2^3919999997 is an apocalyptic number.

It is an amenable number.

3919999997 is a deficient number, since it is larger than the sum of its proper divisors (1).

3919999997 is an equidigital number, since it uses as much as digits as its factorization.

3919999997 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 100442349, while the sum is 74.

The square root of 3919999997 is about 62609.9033460362. The cubic root of 3919999997 is about 1576.7470322188.

The spelling of 3919999997 in words is "three billion, nine hundred nineteen million, nine hundred ninety-nine thousand, nine hundred ninety-seven".