247032749 has 8 divisors (see below), whose sum is σ = 254676408. Its totient is φ = 239466240.

The previous prime is 247032743. The next prime is 247032767. The reversal of 247032749 is 947230742.

It can be written as a sum of positive squares in 4 ways, for example, as 32410249 + 214622500 = 5693^2 + 14650^2 .

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

It is not a de Polignac number, because 247032749 - 2¹⁶ = 246967213 is a prime.

It is a super-2 number, since 2×247032749² = 122050358156994002, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (247032743) 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, 12752 + ... + 25625.

It is an arithmetic number, because the mean of its divisors is an integer number (31834551).

Almost surely, 2^247032749 is an apocalyptic number.

It is an amenable number.

247032749 is a deficient number, since it is larger than the sum of its proper divisors (7643659).

247032749 is a wasteful number, since it uses less digits than its factorization.

247032749 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38575.

The product of its (nonzero) digits is 84672, while the sum is 38.

The square root of 247032749 is about 15717.2754954540. The cubic root of 247032749 is about 627.4582642358.

The spelling of 247032749 in words is "two hundred forty-seven million, thirty-two thousand, seven hundred forty-nine".