672221471 has 2 divisors, whose sum is σ = 672221472. Its totient is φ = 672221470.

The previous prime is 672221467. The next prime is 672221477. The reversal of 672221471 is 174122276.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 672221471 - 2² = 672221467 is a prime.

It is a super-3 number, since 3×672221471³ (a number of 27 digits) contains 333 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (672221477) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 336110735 + 336110736.

It is an arithmetic number, because the mean of its divisors is an integer number (336110736).

Almost surely, 2^672221471 is an apocalyptic number.

672221471 is a deficient number, since it is larger than the sum of its proper divisors (1).

672221471 is an equidigital number, since it uses as much as digits as its factorization.

672221471 is an evil number, because the sum of its binary digits is even.

The product of its digits is 9408, while the sum is 32.

The square root of 672221471 is about 25927.2341563847. The cubic root of 672221471 is about 876.0000412662. Note that the first 4 decimals are identical.

The spelling of 672221471 in words is "six hundred seventy-two million, two hundred twenty-one thousand, four hundred seventy-one".