3997719 has 18 divisors (see below), whose sum is σ = 6348888. Its totient is φ = 2422200.

The previous prime is 3997673. The next prime is 3997723. The reversal of 3997719 is 9177993.

It is not a de Polignac number, because 3997719 - 2⁸ = 3997463 is a prime.

It is a super-2 number, since 2×3997719² = 31963514405922, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3997759) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 747 + ... + 2924.

It is an arithmetic number, because the mean of its divisors is an integer number (352716).

Almost surely, 2^3997719 is an apocalyptic number.

3997719 is a deficient number, since it is larger than the sum of its proper divisors (2351169).

3997719 is a wasteful number, since it uses less digits than its factorization.

3997719 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3699 (or 3685 counting only the distinct ones).

The product of its digits is 107163, while the sum is 45.

The square root of 3997719 is about 1999.4296686805. The cubic root of 3997719 is about 158.7099256111.

It can be divided in two parts, 399 and 7719, that added together give a palindrome (8118).

The spelling of 3997719 in words is "three million, nine hundred ninety-seven thousand, seven hundred nineteen".