247391449 has 8 divisors (see below), whose sum is σ = 249671808. Its totient is φ = 245118240.

The previous prime is 247391447. The next prime is 247391467. The reversal of 247391449 is 944193742.

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 247391449 - 2¹ = 247391447 is a prime.

It is a super-2 number, since 2×247391449² = 122405058076639202, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (247391447) 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, 87244 + ... + 90034.

It is an arithmetic number, because the mean of its divisors is an integer number (31208976).

Almost surely, 2^247391449 is an apocalyptic number.

It is an amenable number.

247391449 is a deficient number, since it is larger than the sum of its proper divisors (2280359).

247391449 is a wasteful number, since it uses less digits than its factorization.

247391449 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3575.

The product of its digits is 217728, while the sum is 43.

The square root of 247391449 is about 15728.6823669372. The cubic root of 247391449 is about 627.7618143143.

The spelling of 247391449 in words is "two hundred forty-seven million, three hundred ninety-one thousand, four hundred forty-nine".