1642904039 has 4 divisors (see below), whose sum is σ = 1877604624. Its totient is φ = 1408203456.

The previous prime is 1642904023. The next prime is 1642904051. The reversal of 1642904039 is 9304092461.

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 1642904039 - 2⁴ = 1642904023 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1642903993 and 1642904011.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1642904339) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 117350282 + ... + 117350295.

It is an arithmetic number, because the mean of its divisors is an integer number (469401156).

Almost surely, 2^1642904039 is an apocalyptic number.

1642904039 is a deficient number, since it is larger than the sum of its proper divisors (234700585).

1642904039 is an equidigital number, since it uses as much as digits as its factorization.

1642904039 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 234700584.

The product of its (nonzero) digits is 46656, while the sum is 38.

The square root of 1642904039 is about 40532.7526699088. The cubic root of 1642904039 is about 1179.9693660054.

The spelling of 1642904039 in words is "one billion, six hundred forty-two million, nine hundred four thousand, thirty-nine".