146989613 has 4 divisors (see below), whose sum is σ = 147089820. Its totient is φ = 146889408.

The previous prime is 146989571. The next prime is 146989621. The reversal of 146989613 is 316989641.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 102860164 + 44129449 = 10142^2 + 6643^2 .

It is a cyclic number.

It is not a de Polignac number, because 146989613 - 2²² = 142795309 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (146989663) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 47870 + ... + 50847.

It is an arithmetic number, because the mean of its divisors is an integer number (36772455).

Almost surely, 2^146989613 is an apocalyptic number.

It is an amenable number.

146989613 is a deficient number, since it is larger than the sum of its proper divisors (100207).

146989613 is an equidigital number, since it uses as much as digits as its factorization.

146989613 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 100206.

The product of its digits is 279936, while the sum is 47.

The square root of 146989613 is about 12123.9272927546. The cubic root of 146989613 is about 527.7507779388.

The spelling of 146989613 in words is "one hundred forty-six million, nine hundred eighty-nine thousand, six hundred thirteen".