642738119 has 4 divisors (see below), whose sum is σ = 642976200. Its totient is φ = 642500040.

The previous prime is 642738101. The next prime is 642738127. The reversal of 642738119 is 911837246.

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 642738119 - 2⁸ = 642737863 is a prime.

It is a super-2 number, since 2×642738119² = 826224579231316322, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (642738179) 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, 114944 + ... + 120405.

It is an arithmetic number, because the mean of its divisors is an integer number (160744050).

Almost surely, 2^642738119 is an apocalyptic number.

642738119 is a deficient number, since it is larger than the sum of its proper divisors (238081).

642738119 is a wasteful number, since it uses less digits than its factorization.

642738119 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 238080.

The product of its digits is 72576, while the sum is 41.

The square root of 642738119 is about 25352.2803510848. The cubic root of 642738119 is about 863.0011063819.

The spelling of 642738119 in words is "six hundred forty-two million, seven hundred thirty-eight thousand, one hundred nineteen".