68490249 has 8 divisors (see below), whose sum is σ = 91439520. Its totient is φ = 45600576.

The previous prime is 68490239. The next prime is 68490277. The reversal of 68490249 is 94209486.

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

It is not a de Polignac number, because 68490249 - 2¹⁵ = 68457481 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 68490249.

It is not an unprimeable number, because it can be changed into a prime (68490239) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12144 + ... + 16865.

It is an arithmetic number, because the mean of its divisors is an integer number (11429940).

Almost surely, 2^68490249 is an apocalyptic number.

It is an amenable number.

68490249 is a deficient number, since it is larger than the sum of its proper divisors (22949271).

68490249 is a wasteful number, since it uses less digits than its factorization.

68490249 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29799.

The product of its (nonzero) digits is 124416, while the sum is 42.

The square root of 68490249 is about 8275.8835782048. The cubic root of 68490249 is about 409.1440580688.

The spelling of 68490249 in words is "sixty-eight million, four hundred ninety thousand, two hundred forty-nine".