146916590209 has 3 divisors (see below), whose sum is σ = 146916973507. Its totient is φ = 146916206912.

The previous prime is 146916590207. The next prime is 146916590269. The reversal of 146916590209 is 902095619641.

It is a happy number.

The square root of 146916590209 is 383297.

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

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in only one way, i.e., 69814850625 + 77101739584 = 264225^2 + 277672^2 .

It is not a de Polignac number, because 146916590209 - 2¹ = 146916590207 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (146916590207) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 191649 + ... + 574945.

Almost surely, 2^146916590209 is an apocalyptic number.

146916590209 is the 383297-th square number.

146916590209 is the 191649-th centered octagonal number.

It is an amenable number.

146916590209 is a deficient number, since it is larger than the sum of its proper divisors (383298).

146916590209 is an frugal number, since it uses more digits than its factorization.

146916590209 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 766594 (or 383297 counting only the distinct ones).

The product of its (nonzero) digits is 1049760, while the sum is 52.

It can be divided in two parts, 14691 and 6590209, that added together give a square (6604900 = 2570²).

The spelling of 146916590209 in words is "one hundred forty-six billion, nine hundred sixteen million, five hundred ninety thousand, two hundred nine".