146687861 has 2 divisors, whose sum is σ = 146687862. Its totient is φ = 146687860.

The previous prime is 146687819. The next prime is 146687867. The reversal of 146687861 is 168786641.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 114083761 + 32604100 = 10681^2 + 5710^2 .

It is a cyclic number.

It is not a de Polignac number, because 146687861 - 2⁶ = 146687797 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (146687867) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 73343930 + 73343931.

It is an arithmetic number, because the mean of its divisors is an integer number (73343931).

Almost surely, 2^146687861 is an apocalyptic number.

It is an amenable number.

146687861 is a deficient number, since it is larger than the sum of its proper divisors (1).

146687861 is an equidigital number, since it uses as much as digits as its factorization.

146687861 is an evil number, because the sum of its binary digits is even.

The product of its digits is 387072, while the sum is 47.

The square root of 146687861 is about 12111.4764170187. The cubic root of 146687861 is about 527.3893942384.

The spelling of 146687861 in words is "one hundred forty-six million, six hundred eighty-seven thousand, eight hundred sixty-one".