147185020609 has 9 divisors (see below), whose sum is σ = 161786520931. Its totient is φ = 133800727720.

The previous prime is 147185020603. The next prime is 147185020637. The reversal of 147185020609 is 906020581741.

The square root of 147185020609 is 383647.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 113633039025 + 33551981584 = 337095^2 + 183172^2 .

It is not a de Polignac number, because 147185020609 - 2²⁷ = 147050802881 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (147185020603) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 4202679 + ... + 4237555.

Almost surely, 2^147185020609 is an apocalyptic number.

147185020609 is the 383647-th square number.

147185020609 is the 191824-th centered octagonal number.

It is an amenable number.

147185020609 is a deficient number, since it is larger than the sum of its proper divisors (14601500322).

147185020609 is an frugal number, since it uses more digits than its factorization.

147185020609 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 69776 (or 34888 counting only the distinct ones).

The product of its (nonzero) digits is 120960, while the sum is 43.

The spelling of 147185020609 in words is "one hundred forty-seven billion, one hundred eighty-five million, twenty thousand, six hundred nine".