146959991 has 4 divisors (see below), whose sum is σ = 147255000. Its totient is φ = 146664984.

The previous prime is 146959963. The next prime is 146959993. The reversal of 146959991 is 199959641.

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

It is a cyclic number.

It is not a de Polignac number, because 146959991 - 2¹⁰ = 146958967 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (146959993) 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, 146756 + ... + 147753.

It is an arithmetic number, because the mean of its divisors is an integer number (36813750).

Almost surely, 2^146959991 is an apocalyptic number.

146959991 is a deficient number, since it is larger than the sum of its proper divisors (295009).

146959991 is an equidigital number, since it uses as much as digits as its factorization.

146959991 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 295008.

The product of its digits is 787320, while the sum is 53.

The square root of 146959991 is about 12122.7055973491. The cubic root of 146959991 is about 527.7153239964.

The spelling of 146959991 in words is "one hundred forty-six million, nine hundred fifty-nine thousand, nine hundred ninety-one".