3974401999 has 4 divisors (see below), whose sum is σ = 4028845936. Its totient is φ = 3919958064.

The previous prime is 3974401957. The next prime is 3974402017. The reversal of 3974401999 is 9991044793.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 9991044793 = 2099 ⋅4759907.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-3974401999 is a prime.

It is a super-3 number, since 3×3974401999³ (a number of 30 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3974401919) 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, 27221859 + ... + 27222004.

It is an arithmetic number, because the mean of its divisors is an integer number (1007211484).

Almost surely, 2^3974401999 is an apocalyptic number.

3974401999 is a deficient number, since it is larger than the sum of its proper divisors (54443937).

3974401999 is an equidigital number, since it uses as much as digits as its factorization.

3974401999 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 54443936.

The product of its (nonzero) digits is 2204496, while the sum is 55.

The square root of 3974401999 is about 63042.8584298015. The cubic root of 3974401999 is about 1584.0076117239.

The spelling of 3974401999 in words is "three billion, nine hundred seventy-four million, four hundred one thousand, nine hundred ninety-nine".