146209993 has 2 divisors, whose sum is σ = 146209994. Its totient is φ = 146209992.

The previous prime is 146209957. The next prime is 146210027. The reversal of 146209993 is 399902641.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 123054649 + 23155344 = 11093^2 + 4812^2 .

It is a cyclic number.

It is not a de Polignac number, because 146209993 - 2¹³ = 146201801 is a prime.

It is not a weakly prime, because it can be changed into another prime (146209913) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 73104996 + 73104997.

It is an arithmetic number, because the mean of its divisors is an integer number (73104997).

Almost surely, 2^146209993 is an apocalyptic number.

It is an amenable number.

146209993 is a deficient number, since it is larger than the sum of its proper divisors (1).

146209993 is an equidigital number, since it uses as much as digits as its factorization.

146209993 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 104976, while the sum is 43.

The square root of 146209993 is about 12091.7324234371. The cubic root of 146209993 is about 526.8160755314.

The spelling of 146209993 in words is "one hundred forty-six million, two hundred nine thousand, nine hundred ninety-three".