3997147730 has 32 divisors (see below), whose sum is σ = 7269547824. Its totient is φ = 1582350336.

The previous prime is 3997147723. The next prime is 3997147733. The reversal of 3997147730 is 377417993.

It is a Cunningham number, because it is equal to 63223²+1.

It can be written as a sum of positive squares in 8 ways, for example, as 968516641 + 3028631089 = 31121^2 + 55033^2 .

It is not an unprimeable number, because it can be changed into a prime (3997147733) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 374954 + ... + 385466.

Almost surely, 2^3997147730 is an apocalyptic number.

3997147730 is a deficient number, since it is larger than the sum of its proper divisors (3272400094).

3997147730 is a wasteful number, since it uses less digits than its factorization.

3997147730 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10910.

The product of its (nonzero) digits is 1000188, while the sum is 50.

The square root of 3997147730 is about 63223.0000079085. Note that the first 5 decimals coincide. The cubic root of 3997147730 is about 1587.0236542174.

The spelling of 3997147730 in words is "three billion, nine hundred ninety-seven million, one hundred forty-seven thousand, seven hundred thirty".