1642622047 has 4 divisors (see below), whose sum is σ = 1791951336. Its totient is φ = 1493292760.

The previous prime is 1642622021. The next prime is 1642622053. The reversal of 1642622047 is 7402262461.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1642622047 - 2²³ = 1634233439 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1642629047) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 74664628 + ... + 74664649.

It is an arithmetic number, because the mean of its divisors is an integer number (447987834).

Almost surely, 2^1642622047 is an apocalyptic number.

1642622047 is a deficient number, since it is larger than the sum of its proper divisors (149329289).

1642622047 is a wasteful number, since it uses less digits than its factorization.

1642622047 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 149329288.

The product of its (nonzero) digits is 32256, while the sum is 34.

The square root of 1642622047 is about 40529.2739510591. The cubic root of 1642622047 is about 1179.9018512160.

The spelling of 1642622047 in words is "one billion, six hundred forty-two million, six hundred twenty-two thousand, forty-seven".