672157247 has 2 divisors, whose sum is σ = 672157248. Its totient is φ = 672157246.

The previous prime is 672157219. The next prime is 672157259. The reversal of 672157247 is 742751276.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 672157247 - 2¹⁰ = 672156223 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (672157217) 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 as a sum of consecutive naturals, namely, 336078623 + 336078624.

It is an arithmetic number, because the mean of its divisors is an integer number (336078624).

Almost surely, 2^672157247 is an apocalyptic number.

672157247 is a deficient number, since it is larger than the sum of its proper divisors (1).

672157247 is an equidigital number, since it uses as much as digits as its factorization.

672157247 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 164640, while the sum is 41.

The square root of 672157247 is about 25925.9955835837. The cubic root of 672157247 is about 875.9721427134.

The spelling of 672157247 in words is "six hundred seventy-two million, one hundred fifty-seven thousand, two hundred forty-seven".