209948493 has 4 divisors (see below), whose sum is σ = 279931328. Its totient is φ = 139965660.

The previous prime is 209948477. The next prime is 209948509. The reversal of 209948493 is 394849902.

209948493 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is an interprime number because it is at equal distance from previous prime (209948477) and next prime (209948509).

It is not a de Polignac number, because 209948493 - 2⁴ = 209948477 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (209928493) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 34991413 + ... + 34991418.

It is an arithmetic number, because the mean of its divisors is an integer number (69982832).

Almost surely, 2^209948493 is an apocalyptic number.

It is an amenable number.

209948493 is a deficient number, since it is larger than the sum of its proper divisors (69982835).

209948493 is an equidigital number, since it uses as much as digits as its factorization.

209948493 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 69982834.

The product of its (nonzero) digits is 559872, while the sum is 48.

The square root of 209948493 is about 14489.5994768662. The cubic root of 209948493 is about 594.3435954951.

The spelling of 209948493 in words is "two hundred nine million, nine hundred forty-eight thousand, four hundred ninety-three".