146991087 has 24 divisors (see below), whose sum is σ = 226661760. Its totient is φ = 91521360.

The previous prime is 146991083. The next prime is 146991127. The reversal of 146991087 is 780199641.

It is a happy number.

It is not a de Polignac number, because 146991087 - 2² = 146991083 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (146991083) 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 23 ways as a sum of consecutive naturals, for example, 6088 + ... + 18194.

It is an arithmetic number, because the mean of its divisors is an integer number (9444240).

Almost surely, 2^146991087 is an apocalyptic number.

146991087 is a deficient number, since it is larger than the sum of its proper divisors (79670673).

146991087 is a wasteful number, since it uses less digits than its factorization.

146991087 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12203 (or 12200 counting only the distinct ones).

The product of its (nonzero) digits is 108864, while the sum is 45.

The square root of 146991087 is about 12123.9880814854. The cubic root of 146991087 is about 527.7525420136.

The spelling of 146991087 in words is "one hundred forty-six million, nine hundred ninety-one thousand, eighty-seven".