1642089447 has 12 divisors (see below), whose sum is σ = 2374152144. Its totient is φ = 1093690080.

The previous prime is 1642089419. The next prime is 1642089451. The reversal of 1642089447 is 7449802461.

1642089447 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 1642089447 - 2¹¹ = 1642087399 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1642089047) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 76254 + ... + 95387.

It is an arithmetic number, because the mean of its divisors is an integer number (197846012).

Almost surely, 2^1642089447 is an apocalyptic number.

1642089447 is a deficient number, since it is larger than the sum of its proper divisors (732062697).

1642089447 is a wasteful number, since it uses less digits than its factorization.

1642089447 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 172710 (or 172707 counting only the distinct ones).

The product of its (nonzero) digits is 387072, while the sum is 45.

The square root of 1642089447 is about 40522.7028590147. The cubic root of 1642089447 is about 1179.7743145421.

The spelling of 1642089447 in words is "one billion, six hundred forty-two million, eighty-nine thousand, four hundred forty-seven".