670531447 has 2 divisors, whose sum is σ = 670531448. Its totient is φ = 670531446.

The previous prime is 670531321. The next prime is 670531453. The reversal of 670531447 is 744135076.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 670531447 - 2¹⁵ = 670498679 is a prime.

It is a super-2 number, since 2×670531447² = 899224842831827618, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (670531747) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 335265723 + 335265724.

It is an arithmetic number, because the mean of its divisors is an integer number (335265724).

Almost surely, 2^670531447 is an apocalyptic number.

670531447 is a deficient number, since it is larger than the sum of its proper divisors (1).

670531447 is an equidigital number, since it uses as much as digits as its factorization.

670531447 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 70560, while the sum is 37.

The square root of 670531447 is about 25894.6219705946. The cubic root of 670531447 is about 875.2653114371.

The spelling of 670531447 in words is "six hundred seventy million, five hundred thirty-one thousand, four hundred forty-seven".