147267721 has 2 divisors, whose sum is σ = 147267722. Its totient is φ = 147267720.

The previous prime is 147267709. The next prime is 147267767. The reversal of 147267721 is 127762741.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 146894400 + 373321 = 12120^2 + 611^2 .

It is a cyclic number.

It is not a de Polignac number, because 147267721 - 2¹⁵ = 147234953 is a prime.

It is not a weakly prime, because it can be changed into another prime (147267521) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 73633860 + 73633861.

It is an arithmetic number, because the mean of its divisors is an integer number (73633861).

Almost surely, 2^147267721 is an apocalyptic number.

It is an amenable number.

147267721 is a deficient number, since it is larger than the sum of its proper divisors (1).

147267721 is an equidigital number, since it uses as much as digits as its factorization.

147267721 is an evil number, because the sum of its binary digits is even.

The product of its digits is 32928, while the sum is 37.

The square root of 147267721 is about 12135.3912586286. The cubic root of 147267721 is about 528.0834074407.

The spelling of 147267721 in words is "one hundred forty-seven million, two hundred sixty-seven thousand, seven hundred twenty-one".