146821387 has 2 divisors, whose sum is σ = 146821388. Its totient is φ = 146821386.

The previous prime is 146821309. The next prime is 146821399. The reversal of 146821387 is 783128641.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-146821387 is a prime.

It is not a weakly prime, because it can be changed into another prime (146821687) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 73410693 + 73410694.

It is an arithmetic number, because the mean of its divisors is an integer number (73410694).

Almost surely, 2^146821387 is an apocalyptic number.

146821387 is a deficient number, since it is larger than the sum of its proper divisors (1).

146821387 is an equidigital number, since it uses as much as digits as its factorization.

146821387 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 64512, while the sum is 40.

The square root of 146821387 is about 12116.9875381631. The cubic root of 146821387 is about 527.5493684843.

The spelling of 146821387 in words is "one hundred forty-six million, eight hundred twenty-one thousand, three hundred eighty-seven".