72670673 has 4 divisors (see below), whose sum is σ = 72933300. Its totient is φ = 72408048.

The previous prime is 72670669. The next prime is 72670681. The reversal of 72670673 is 37607627.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 8862529 + 63808144 = 2977^2 + 7988^2 .

It is a cyclic number.

It is not a de Polignac number, because 72670673 - 2² = 72670669 is a prime.

It is a super-3 number, since 3×72670673³ (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 (72670613) 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, 130898 + ... + 131451.

It is an arithmetic number, because the mean of its divisors is an integer number (18233325).

Almost surely, 2^72670673 is an apocalyptic number.

It is an amenable number.

72670673 is a deficient number, since it is larger than the sum of its proper divisors (262627).

72670673 is a wasteful number, since it uses less digits than its factorization.

72670673 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 262626.

The product of its (nonzero) digits is 74088, while the sum is 38.

The square root of 72670673 is about 8524.7095551696. The cubic root of 72670673 is about 417.3044930655.

The spelling of 72670673 in words is "seventy-two million, six hundred seventy thousand, six hundred seventy-three".