3997144651 has 4 divisors (see below), whose sum is σ = 3997294704. Its totient is φ = 3996994600.

The previous prime is 3997144639. The next prime is 3997144693. The reversal of 3997144651 is 1564417993.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 3997144651 - 2⁷ = 3997144523 is a prime.

It is a super-2 number, since 2×3997144651² = 31954330722035823602, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 3997144595 and 3997144604.

It is not an unprimeable number, because it can be changed into a prime (3997144051) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 23080 + ... + 92341.

It is an arithmetic number, because the mean of its divisors is an integer number (999323676).

Almost surely, 2^3997144651 is an apocalyptic number.

3997144651 is a deficient number, since it is larger than the sum of its proper divisors (150053).

3997144651 is a wasteful number, since it uses less digits than its factorization.

3997144651 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 150052.

The product of its digits is 816480, while the sum is 49.

The square root of 3997144651 is about 63222.9756575883. The cubic root of 3997144651 is about 1587.0232467229.

The spelling of 3997144651 in words is "three billion, nine hundred ninety-seven million, one hundred forty-four thousand, six hundred fifty-one".