672243081 has 4 divisors (see below), whose sum is σ = 896324112. Its totient is φ = 448162052.

The previous prime is 672243079. The next prime is 672243083. The reversal of 672243081 is 180342276.

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.

It is an interprime number because it is at equal distance from previous prime (672243079) and next prime (672243083).

It is a cyclic number.

It is not a de Polignac number, because 672243081 - 2¹ = 672243079 is a prime.

It is a super-2 number, since 2×672243081² = 903821519904745122, which contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (672243083) 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, 112040511 + ... + 112040516.

It is an arithmetic number, because the mean of its divisors is an integer number (224081028).

Almost surely, 2^672243081 is an apocalyptic number.

It is an amenable number.

672243081 is a deficient number, since it is larger than the sum of its proper divisors (224081031).

672243081 is a wasteful number, since it uses less digits than its factorization.

672243081 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 224081030.

The product of its (nonzero) digits is 16128, while the sum is 33.

The square root of 672243081 is about 25927.6508962922. The cubic root of 672243081 is about 876.0094281319.

The spelling of 672243081 in words is "six hundred seventy-two million, two hundred forty-three thousand, eighty-one".