72312049 has 4 divisors (see below), whose sum is σ = 72331236. Its totient is φ = 72292864.

The previous prime is 72312047. The next prime is 72312073. The reversal of 72312049 is 94021327.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 94021327 = 613 ⋅153379.

It can be written as a sum of positive squares in 2 ways, for example, as 25321024 + 46991025 = 5032^2 + 6855^2 .

It is a cyclic number.

It is not a de Polignac number, because 72312049 - 2¹ = 72312047 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (72312041) 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, 1864 + ... + 12169.

It is an arithmetic number, because the mean of its divisors is an integer number (18082809).

Almost surely, 2^72312049 is an apocalyptic number.

It is an amenable number.

72312049 is a deficient number, since it is larger than the sum of its proper divisors (19187).

72312049 is a wasteful number, since it uses less digits than its factorization.

72312049 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19186.

The product of its (nonzero) digits is 3024, while the sum is 28.

The square root of 72312049 is about 8503.6491578616. The cubic root of 72312049 is about 416.6169059153.

The spelling of 72312049 in words is "seventy-two million, three hundred twelve thousand, forty-nine".