146623381 has 2 divisors, whose sum is σ = 146623382.
Its totient is φ = 146623380.
The previous prime is 146623369. The next prime is 146623429. The reversal of 146623381 is 183326641.
It is a happy number.
It is a weak prime.
It can be written as a sum of positive squares in only one way, i.e., 90897156 + 55726225 = 9534^2 + 7465^2
It is a cyclic number.
It is not a de Polignac number, because 146623381 - 25 = 146623349 is a prime.
It is a super-2 number, since 2×1466233812 = 42996831711742322, which contains 22 as substring.
It is a congruent number.
It is not a weakly prime, because it can be changed into another prime (146623331) by changing a digit.
It is a polite number, since it can be written as a sum of consecutive naturals, namely, 73311690 + 73311691.
It is an arithmetic number, because the mean of its divisors is an integer number (73311691).
Almost surely, 2146623381 is an apocalyptic number.
It is an amenable number.
146623381 is a deficient number, since it is larger than the sum of its proper divisors (1).
146623381 is an equidigital number, since it uses as much as digits as its factorization.
146623381 is an odious number, because the sum of its binary digits is odd.
The product of its digits is 20736, while the sum is 34.
The square root of 146623381 is about 12108.8141863685.
The cubic root of 146623381 is about 527.3121075612.
The spelling of 146623381 in words is "one hundred forty-six million, six hundred twenty-three thousand, three hundred eighty-one".