3987572434 has 4 divisors (see below), whose sum is σ = 5981358654. Its totient is φ = 1993786216.

The previous prime is 3987572431. The next prime is 3987572437. The reversal of 3987572434 is 4342757893.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 4342757893 = 439 ⋅9892387.

It is an interprime number because it is at equal distance from previous prime (3987572431) and next prime (3987572437).

It can be written as a sum of positive squares in only one way, i.e., 2099930625 + 1887641809 = 45825^2 + 43447^2 .

It is not an unprimeable number, because it can be changed into a prime (3987572431) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 996893107 + ... + 996893110.

Almost surely, 2^3987572434 is an apocalyptic number.

3987572434 is a deficient number, since it is larger than the sum of its proper divisors (1993786220).

3987572434 is a wasteful number, since it uses less digits than its factorization.

3987572434 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1993786219.

The product of its digits is 5080320, while the sum is 52.

The square root of 3987572434 is about 63147.2282368751. The cubic root of 3987572434 is about 1585.7553855422.

The spelling of 3987572434 in words is "three billion, nine hundred eighty-seven million, five hundred seventy-two thousand, four hundred thirty-four".