146443391 has 2 divisors, whose sum is σ = 146443392. Its totient is φ = 146443390.

The previous prime is 146443361. The next prime is 146443403. The reversal of 146443391 is 193344641.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 146443391 - 2¹⁸ = 146181247 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (146443351) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 73221695 + 73221696.

It is an arithmetic number, because the mean of its divisors is an integer number (73221696).

Almost surely, 2^146443391 is an apocalyptic number.

146443391 is a deficient number, since it is larger than the sum of its proper divisors (1).

146443391 is an equidigital number, since it uses as much as digits as its factorization.

146443391 is an evil number, because the sum of its binary digits is even.

The product of its digits is 31104, while the sum is 35.

The square root of 146443391 is about 12101.3797147267. The cubic root of 146443391 is about 527.0962489249.

The spelling of 146443391 in words is "one hundred forty-six million, four hundred forty-three thousand, three hundred ninety-one".