72839031 has 4 divisors (see below), whose sum is σ = 97118712. Its totient is φ = 48559352.

The previous prime is 72839029. The next prime is 72839059. The reversal of 72839031 is 13093827.

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 72839031 - 2¹ = 72839029 is a prime.

It is a super-2 number, since 2×72839031² = 10611048874037922, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 72838983 and 72839001.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72839131) 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, 12139836 + ... + 12139841.

It is an arithmetic number, because the mean of its divisors is an integer number (24279678).

Almost surely, 2^72839031 is an apocalyptic number.

72839031 is a deficient number, since it is larger than the sum of its proper divisors (24279681).

72839031 is a wasteful number, since it uses less digits than its factorization.

72839031 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24279680.

The product of its (nonzero) digits is 9072, while the sum is 33.

The square root of 72839031 is about 8534.5785484697. The cubic root of 72839031 is about 417.6265045071.

The spelling of 72839031 in words is "seventy-two million, eight hundred thirty-nine thousand, thirty-one".