4138664997 has 4 divisors (see below), whose sum is σ = 5518220000. Its totient is φ = 2759109996.

The previous prime is 4138664983. The next prime is 4138665071. The reversal of 4138664997 is 7994668314.

4138664997 is digitally balanced in base 2, base 3 and base 4, because in such bases it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 4138664997 - 2⁷ = 4138664869 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4138668997) 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, 689777497 + ... + 689777502.

It is an arithmetic number, because the mean of its divisors is an integer number (1379555000).

Almost surely, 2^4138664997 is an apocalyptic number.

It is an amenable number.

4138664997 is a deficient number, since it is larger than the sum of its proper divisors (1379555003).

4138664997 is a wasteful number, since it uses less digits than its factorization.

4138664997 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1379555002.

The product of its digits is 7838208, while the sum is 57.

The square root of 4138664997 is about 64332.4567928196. The cubic root of 4138664997 is about 1605.5361603876.

The spelling of 4138664997 in words is "four billion, one hundred thirty-eight million, six hundred sixty-four thousand, nine hundred ninety-seven".