642487299 has 8 divisors (see below), whose sum is σ = 901736640. Its totient is φ = 405781416.

The previous prime is 642487297. The next prime is 642487303. The reversal of 642487299 is 992784246.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 642487299 - 2¹ = 642487297 is a prime.

It is not an unprimeable number, because it can be changed into a prime (642487291) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5635797 + ... + 5635910.

It is an arithmetic number, because the mean of its divisors is an integer number (112717080).

Almost surely, 2^642487299 is an apocalyptic number.

642487299 is a deficient number, since it is larger than the sum of its proper divisors (259249341).

642487299 is a wasteful number, since it uses less digits than its factorization.

642487299 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11271729.

The product of its digits is 1741824, while the sum is 51.

The square root of 642487299 is about 25347.3331733340. Note that the first 3 decimals coincide. The cubic root of 642487299 is about 862.8888335428. Note that the first 4 decimals are identical.

The spelling of 642487299 in words is "six hundred forty-two million, four hundred eighty-seven thousand, two hundred ninety-nine".