146778899 has 2 divisors, whose sum is σ = 146778900. Its totient is φ = 146778898.

The previous prime is 146778887. The next prime is 146778911. The reversal of 146778899 is 998877641.

It is a balanced prime because it is at equal distance from previous prime (146778887) and next prime (146778911).

It is a cyclic number.

It is not a de Polignac number, because 146778899 - 2¹⁶ = 146713363 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a plaindrome in base 10.

It is not a weakly prime, because it can be changed into another prime (146778809) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 73389449 + 73389450.

It is an arithmetic number, because the mean of its divisors is an integer number (73389450).

Almost surely, 2^146778899 is an apocalyptic number.

146778899 is a deficient number, since it is larger than the sum of its proper divisors (1).

146778899 is an equidigital number, since it uses as much as digits as its factorization.

146778899 is an evil number, because the sum of its binary digits is even.

The product of its digits is 6096384, while the sum is 59.

The square root of 146778899 is about 12115.2341702503. The cubic root of 146778899 is about 527.4984751721.

The spelling of 146778899 in words is "one hundred forty-six million, seven hundred seventy-eight thousand, eight hundred ninety-nine".