72684049 has 4 divisors (see below), whose sum is σ = 73707840. Its totient is φ = 71660260.

The previous prime is 72684037. The next prime is 72684067. The reversal of 72684049 is 94048627.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 94048627 = 5431 ⋅17317.

It is a cyclic number.

It is not a de Polignac number, because 72684049 - 2⁹ = 72683537 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (72684649) 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, 511789 + ... + 511930.

It is an arithmetic number, because the mean of its divisors is an integer number (18426960).

Almost surely, 2^72684049 is an apocalyptic number.

It is an amenable number.

72684049 is a deficient number, since it is larger than the sum of its proper divisors (1023791).

72684049 is a wasteful number, since it uses less digits than its factorization.

72684049 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1023790.

The product of its (nonzero) digits is 96768, while the sum is 40.

The square root of 72684049 is about 8525.4940619298. The cubic root of 72684049 is about 417.3300949681.

The spelling of 72684049 in words is "seventy-two million, six hundred eighty-four thousand, forty-nine".