146396981 has 2 divisors, whose sum is σ = 146396982. Its totient is φ = 146396980.

The previous prime is 146396951. The next prime is 146397007. The reversal of 146396981 is 189693641.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 134768881 + 11628100 = 11609^2 + 3410^2 .

It is an emirp because it is prime and its reverse (189693641) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 146396981 - 2⁶ = 146396917 is a prime.

It is a super-2 number, since 2×146396981² = 42864152091828722, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (146396951) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 73198490 + 73198491.

It is an arithmetic number, because the mean of its divisors is an integer number (73198491).

Almost surely, 2^146396981 is an apocalyptic number.

It is an amenable number.

146396981 is a deficient number, since it is larger than the sum of its proper divisors (1).

146396981 is an equidigital number, since it uses as much as digits as its factorization.

146396981 is an evil number, because the sum of its binary digits is even.

The product of its digits is 279936, while the sum is 47.

The square root of 146396981 is about 12099.4620128335. The cubic root of 146396981 is about 527.0405616012.

The spelling of 146396981 in words is "one hundred forty-six million, three hundred ninety-six thousand, nine hundred eighty-one".