72674209 has 4 divisors (see below), whose sum is σ = 72693040. Its totient is φ = 72655380.

The previous prime is 72674197. The next prime is 72674237. The reversal of 72674209 is 90247627.

It is a happy number.

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: 90247627 = 353 ⋅255659.

It is a cyclic number.

It is not a de Polignac number, because 72674209 - 2⁵ = 72674177 is a prime.

It is a super-3 number, since 3×72674209³ (a number of 25 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (72674009) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1287 + ... + 12124.

It is an arithmetic number, because the mean of its divisors is an integer number (18173260).

Almost surely, 2^72674209 is an apocalyptic number.

It is an amenable number.

72674209 is a deficient number, since it is larger than the sum of its proper divisors (18831).

72674209 is a wasteful number, since it uses less digits than its factorization.

72674209 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18830.

The product of its (nonzero) digits is 42336, while the sum is 37.

The square root of 72674209 is about 8524.9169497421. The cubic root of 72674209 is about 417.3112613380.

It can be divided in two parts, 7267 and 4209, that added together give a triangular number (11476 = T₁₅₁).

The spelling of 72674209 in words is "seventy-two million, six hundred seventy-four thousand, two hundred nine".