3999999974 has 8 divisors (see below), whose sum is σ = 6009985128. Its totient is φ = 1996671600.

The previous prime is 3999999937. The next prime is 3999999979. The reversal of 3999999974 is 4799999993.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a junction number, because it is equal to n+sod(n) for n = 3999999895 and 3999999904.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3999999979) 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, 1662692 + ... + 1665095.

It is an arithmetic number, because the mean of its divisors is an integer number (751248141).

Almost surely, 2^3999999974 is an apocalyptic number.

3999999974 is a deficient number, since it is larger than the sum of its proper divisors (2009985154).

3999999974 is a wasteful number, since it uses less digits than its factorization.

3999999974 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3328390.

The product of its digits is 401769396, while the sum is 77.

The square root of 3999999974 is about 63245.5529978195. The cubic root of 3999999974 is about 1587.4010485288.

The spelling of 3999999974 in words is "three billion, nine hundred ninety-nine million, nine hundred ninety-nine thousand, nine hundred seventy-four".