247429287 has 12 divisors (see below), whose sum is σ = 408454800. Its totient is φ = 141388128.

The previous prime is 247429277. The next prime is 247429289. The reversal of 247429287 is 782924742.

It is not a de Polignac number, because 247429287 - 2⁸ = 247429031 is a prime.

It is a super-2 number, since 2×247429287² = 122442504130656738, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (247429289) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1963662 + ... + 1963787.

It is an arithmetic number, because the mean of its divisors is an integer number (34037900).

Almost surely, 2^247429287 is an apocalyptic number.

247429287 is a deficient number, since it is larger than the sum of its proper divisors (161025513).

247429287 is a wasteful number, since it uses less digits than its factorization.

247429287 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3927462 (or 3927459 counting only the distinct ones).

The product of its digits is 451584, while the sum is 45.

The square root of 247429287 is about 15729.8851553341. The cubic root of 247429287 is about 627.7938176310.

The spelling of 247429287 in words is "two hundred forty-seven million, four hundred twenty-nine thousand, two hundred eighty-seven".