146612991 has 16 divisors (see below), whose sum is σ = 225173504. Its totient is φ = 83117664.

The previous prime is 146612969. The next prime is 146613001. The reversal of 146612991 is 199216641.

It is not a de Polignac number, because 146612991 - 2⁶ = 146612927 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 (146612491) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 24820 + ... + 30153.

It is an arithmetic number, because the mean of its divisors is an integer number (14073344).

Almost surely, 2^146612991 is an apocalyptic number.

146612991 is a deficient number, since it is larger than the sum of its proper divisors (78560513).

146612991 is a wasteful number, since it uses less digits than its factorization.

146612991 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55110.

The product of its digits is 23328, while the sum is 39.

The square root of 146612991 is about 12108.3851524470. The cubic root of 146612991 is about 527.2996518347.

The spelling of 146612991 in words is "one hundred forty-six million, six hundred twelve thousand, nine hundred ninety-one".