146991133 has 2 divisors, whose sum is σ = 146991134. Its totient is φ = 146991132.

The previous prime is 146991127. The next prime is 146991179. The reversal of 146991133 is 331199641.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 131285764 + 15705369 = 11458^2 + 3963^2 .

It is a cyclic number.

It is not a de Polignac number, because 146991133 - 2⁹ = 146990621 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 146991092 and 146991101.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (146991193) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 73495566 + 73495567.

It is an arithmetic number, because the mean of its divisors is an integer number (73495567).

Almost surely, 2^146991133 is an apocalyptic number.

It is an amenable number.

146991133 is a deficient number, since it is larger than the sum of its proper divisors (1).

146991133 is an equidigital number, since it uses as much as digits as its factorization.

146991133 is an evil number, because the sum of its binary digits is even.

The product of its digits is 17496, while the sum is 37.

The square root of 146991133 is about 12123.9899785508. The cubic root of 146991133 is about 527.7525970660.

The spelling of 146991133 in words is "one hundred forty-six million, nine hundred ninety-one thousand, one hundred thirty-three".