7218742039 has 8 divisors (see below), whose sum is σ = 7427110320. Its totient is φ = 7011912000.

The previous prime is 7218742009. The next prime is 7218742081. The reversal of 7218742039 is 9302478127.

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

It is a cyclic number.

It is not a de Polignac number, because 7218742039 - 2⁹ = 7218741527 is a prime.

It is a super-2 number, since 2×7218742039² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 7218741986 and 7218742004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7218742009) 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, 375037 + ... + 393814.

It is an arithmetic number, because the mean of its divisors is an integer number (928388790).

Almost surely, 2^7218742039 is an apocalyptic number.

7218742039 is a deficient number, since it is larger than the sum of its proper divisors (208368281).

7218742039 is a wasteful number, since it uses less digits than its factorization.

7218742039 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 769121.

The product of its (nonzero) digits is 169344, while the sum is 43.

The square root of 7218742039 is about 84963.1804901394. The cubic root of 7218742039 is about 1932.6528026708.

The spelling of 7218742039 in words is "seven billion, two hundred eighteen million, seven hundred forty-two thousand, thirty-nine".