146350291981 has 2 divisors, whose sum is σ = 146350291982. Its totient is φ = 146350291980.

The previous prime is 146350291903. The next prime is 146350291999. The reversal of 146350291981 is 189192053641.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 114068983081 + 32281308900 = 337741^2 + 179670^2 .

It is an emirp because it is prime and its reverse (189192053641) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 146350291981 - 2²⁷ = 146216074253 is a prime.

It is a super-2 number, since 2×146350291981² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (146390291981) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 73175145990 + 73175145991.

It is an arithmetic number, because the mean of its divisors is an integer number (73175145991).

Almost surely, 2^146350291981 is an apocalyptic number.

It is an amenable number.

146350291981 is a deficient number, since it is larger than the sum of its proper divisors (1).

146350291981 is an equidigital number, since it uses as much as digits as its factorization.

146350291981 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 466560, while the sum is 49.

The spelling of 146350291981 in words is "one hundred forty-six billion, three hundred fifty million, two hundred ninety-one thousand, nine hundred eighty-one".