146640407 has 2 divisors, whose sum is σ = 146640408. Its totient is φ = 146640406.

The previous prime is 146640367. The next prime is 146640409. The reversal of 146640407 is 704046641.

It is a strong prime.

It is an emirp because it is prime and its reverse (704046641) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 146640407 - 2¹⁸ = 146378263 is a prime.

Together with 146640409, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (146640409) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 73320203 + 73320204.

It is an arithmetic number, because the mean of its divisors is an integer number (73320204).

Almost surely, 2^146640407 is an apocalyptic number.

146640407 is a deficient number, since it is larger than the sum of its proper divisors (1).

146640407 is an equidigital number, since it uses as much as digits as its factorization.

146640407 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 16128, while the sum is 32.

The square root of 146640407 is about 12109.5172075521. The cubic root of 146640407 is about 527.3325173767.

The spelling of 146640407 in words is "one hundred forty-six million, six hundred forty thousand, four hundred seven".