147681539 has 2 divisors, whose sum is σ = 147681540. Its totient is φ = 147681538.

The previous prime is 147681497. The next prime is 147681553. The reversal of 147681539 is 935186741.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-147681539 is a prime.

It is a super-2 number, since 2×147681539² = 43619673922817042, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 147681539.

It is not a weakly prime, because it can be changed into another prime (147681739) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 73840769 + 73840770.

It is an arithmetic number, because the mean of its divisors is an integer number (73840770).

Almost surely, 2^147681539 is an apocalyptic number.

147681539 is a deficient number, since it is larger than the sum of its proper divisors (1).

147681539 is an equidigital number, since it uses as much as digits as its factorization.

147681539 is an evil number, because the sum of its binary digits is even.

The product of its digits is 181440, while the sum is 44.

The square root of 147681539 is about 12152.4293456082. The cubic root of 147681539 is about 528.5775778512.

The spelling of 147681539 in words is "one hundred forty-seven million, six hundred eighty-one thousand, five hundred thirty-nine".