147447557 has 2 divisors, whose sum is σ = 147447558. Its totient is φ = 147447556.

The previous prime is 147447551. The next prime is 147447589. The reversal of 147447557 is 755744741.

147447557 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 77457601 + 69989956 = 8801^2 + 8366^2 .

It is a cyclic number.

It is not a de Polignac number, because 147447557 - 2⁶ = 147447493 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (147447551) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 73723778 + 73723779.

It is an arithmetic number, because the mean of its divisors is an integer number (73723779).

Almost surely, 2^147447557 is an apocalyptic number.

It is an amenable number.

147447557 is a deficient number, since it is larger than the sum of its proper divisors (1).

147447557 is an equidigital number, since it uses as much as digits as its factorization.

147447557 is an evil number, because the sum of its binary digits is even.

The product of its digits is 548800, while the sum is 44.

The square root of 147447557 is about 12142.7985654049. The cubic root of 147447557 is about 528.2982763799.

The spelling of 147447557 in words is "one hundred forty-seven million, four hundred forty-seven thousand, five hundred fifty-seven".