146821687 has 2 divisors, whose sum is σ = 146821688. Its totient is φ = 146821686.

The previous prime is 146821663. The next prime is 146821699. The reversal of 146821687 is 786128641.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 146821687 - 2¹⁵ = 146788919 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (146821637) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 73410843 + 73410844.

It is an arithmetic number, because the mean of its divisors is an integer number (73410844).

Almost surely, 2^146821687 is an apocalyptic number.

146821687 is a deficient number, since it is larger than the sum of its proper divisors (1).

146821687 is an equidigital number, since it uses as much as digits as its factorization.

146821687 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 129024, while the sum is 43.

The square root of 146821687 is about 12116.9999174713. Note that the first 4 decimals coincide. The cubic root of 146821687 is about 527.5497277978.

The spelling of 146821687 in words is "one hundred forty-six million, eight hundred twenty-one thousand, six hundred eighty-seven".