246640643 has 8 divisors (see below), whose sum is σ = 249729216. Its totient is φ = 243570600.

The previous prime is 246640633. The next prime is 246640649. The reversal of 246640643 is 346046642.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 246640643 - 2¹² = 246636547 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (246640649) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 23180 + ... + 32102.

It is an arithmetic number, because the mean of its divisors is an integer number (31216152).

Almost surely, 2^246640643 is an apocalyptic number.

246640643 is a deficient number, since it is larger than the sum of its proper divisors (3088573).

246640643 is a wasteful number, since it uses less digits than its factorization.

246640643 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9265.

The product of its (nonzero) digits is 82944, while the sum is 35.

The square root of 246640643 is about 15704.7968149862. The cubic root of 246640643 is about 627.1261079561.

The spelling of 246640643 in words is "two hundred forty-six million, six hundred forty thousand, six hundred forty-three".