147739909 has 2 divisors, whose sum is σ = 147739910. Its totient is φ = 147739908.

The previous prime is 147739901. The next prime is 147739913. The reversal of 147739909 is 909937741.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 134212225 + 13527684 = 11585^2 + 3678^2 .

It is a cyclic number.

It is not a de Polignac number, because 147739909 - 2³ = 147739901 is a prime.

It is a super-2 number, since 2×147739909² = 43654161422656562, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (147739901) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 73869954 + 73869955.

It is an arithmetic number, because the mean of its divisors is an integer number (73869955).

Almost surely, 2^147739909 is an apocalyptic number.

It is an amenable number.

147739909 is a deficient number, since it is larger than the sum of its proper divisors (1).

147739909 is an equidigital number, since it uses as much as digits as its factorization.

147739909 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 428652, while the sum is 49.

The square root of 147739909 is about 12154.8306857809. The cubic root of 147739909 is about 528.6472074282.

The spelling of 147739909 in words is "one hundred forty-seven million, seven hundred thirty-nine thousand, nine hundred nine".