146638861 has 2 divisors, whose sum is σ = 146638862. Its totient is φ = 146638860.

The previous prime is 146638847. The next prime is 146638867. The reversal of 146638861 is 168836641.

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., 79316836 + 67322025 = 8906^2 + 8205^2 .

It is a cyclic number.

It is not a de Polignac number, because 146638861 - 2⁵ = 146638829 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (146638867) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 73319430 + 73319431.

It is an arithmetic number, because the mean of its divisors is an integer number (73319431).

Almost surely, 2^146638861 is an apocalyptic number.

It is an amenable number.

146638861 is a deficient number, since it is larger than the sum of its proper divisors (1).

146638861 is an equidigital number, since it uses as much as digits as its factorization.

146638861 is an evil number, because the sum of its binary digits is even.

The product of its digits is 165888, while the sum is 43.

The square root of 146638861 is about 12109.4533732948. The cubic root of 146638861 is about 527.3306641837.

The spelling of 146638861 in words is "one hundred forty-six million, six hundred thirty-eight thousand, eight hundred sixty-one".