642094719 has 8 divisors (see below), whose sum is σ = 978430080. Its totient is φ = 366911256.

The previous prime is 642094667. The next prime is 642094729. The reversal of 642094719 is 917490246.

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

It is not a de Polignac number, because 642094719 - 2⁹ = 642094207 is a prime.

It is a super-2 number, since 2×642094719² = 824571256335377922, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (642094729) 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 7 ways as a sum of consecutive naturals, for example, 15287949 + ... + 15287990.

It is an arithmetic number, because the mean of its divisors is an integer number (122303760).

Almost surely, 2^642094719 is an apocalyptic number.

642094719 is a deficient number, since it is larger than the sum of its proper divisors (336335361).

642094719 is a wasteful number, since it uses less digits than its factorization.

642094719 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30575949.

The product of its (nonzero) digits is 108864, while the sum is 42.

The square root of 642094719 is about 25339.5879800758. The cubic root of 642094719 is about 862.7130469716.

The spelling of 642094719 in words is "six hundred forty-two million, ninety-four thousand, seven hundred nineteen".