1642472999 has 4 divisors (see below), whose sum is σ = 1643591040. Its totient is φ = 1641354960.

The previous prime is 1642472983. The next prime is 1642473011. The reversal of 1642472999 is 9992742461.

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 1642472999 - 2⁴ = 1642472983 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1642472999.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1642472939) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 556814 + ... + 559755.

It is an arithmetic number, because the mean of its divisors is an integer number (410897760).

Almost surely, 2^1642472999 is an apocalyptic number.

1642472999 is a deficient number, since it is larger than the sum of its proper divisors (1118041).

1642472999 is a wasteful number, since it uses less digits than its factorization.

1642472999 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1118040.

The product of its digits is 1959552, while the sum is 53.

The square root of 1642472999 is about 40527.4351396680. The cubic root of 1642472999 is about 1179.8661628825.

The spelling of 1642472999 in words is "one billion, six hundred forty-two million, four hundred seventy-two thousand, nine hundred ninety-nine".