3973149642 has 32 divisors (see below), whose sum is σ = 9907075584. Its totient is φ = 1031986800.

The previous prime is 3973149619. The next prime is 3973149671. The reversal of 3973149642 is 2469413793.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 3973149591 and 3973149600.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4299484 + ... + 4300407.

It is an arithmetic number, because the mean of its divisors is an integer number (309596112).

Almost surely, 2^3973149642 is an apocalyptic number.

3973149642 is an abundant number, since it is smaller than the sum of its proper divisors (5933925942).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

3973149642 is a wasteful number, since it uses less digits than its factorization.

3973149642 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8599914.

The product of its digits is 979776, while the sum is 48.

The square root of 3973149642 is about 63032.9250630177. The cubic root of 3973149642 is about 1583.8412175997.

The spelling of 3973149642 in words is "three billion, nine hundred seventy-three million, one hundred forty-nine thousand, six hundred forty-two".