247888949 has 12 divisors (see below), whose sum is σ = 311398752. Its totient is φ = 193159560.

The previous prime is 247888943. The next prime is 247888957. The reversal of 247888949 is 949888742.

It is a de Polignac number, because none of the positive numbers 2^k-247888949 is a prime.

It is a super-2 number, since 2×247888949² = 122897862072649202, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (247888943) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 145487 + ... + 147180.

It is an arithmetic number, because the mean of its divisors is an integer number (25949896).

Almost surely, 2^247888949 is an apocalyptic number.

It is an amenable number.

247888949 is a deficient number, since it is larger than the sum of its proper divisors (63509803).

247888949 is a wasteful number, since it uses less digits than its factorization.

247888949 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 292696 (or 292685 counting only the distinct ones).

The product of its digits is 9289728, while the sum is 59.

The square root of 247888949 is about 15744.4894804500. The cubic root of 247888949 is about 628.1823386647.

The spelling of 247888949 in words is "two hundred forty-seven million, eight hundred eighty-eight thousand, nine hundred forty-nine".