247978379252 has 12 divisors (see below), whose sum is σ = 441076297956. Its totient is φ = 121956579840.

The previous prime is 247978379239. The next prime is 247978379261. The reversal of 247978379252 is 252973879742.

It can be written as a sum of positive squares in 2 ways, for example, as 8156618596 + 239821760656 = 90314^2 + 489716^2 .

It is a super-2 number, since 2×247978379252² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 508152173 + ... + 508152660.

It is an arithmetic number, because the mean of its divisors is an integer number (36756358163).

Almost surely, 2^247978379252 is an apocalyptic number.

It is an amenable number.

247978379252 is a deficient number, since it is larger than the sum of its proper divisors (193097918704).

247978379252 is a wasteful number, since it uses less digits than its factorization.

247978379252 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1016304898 (or 1016304896 counting only the distinct ones).

The product of its digits is 106686720, while the sum is 65.

The spelling of 247978379252 in words is "two hundred forty-seven billion, nine hundred seventy-eight million, three hundred seventy-nine thousand, two hundred fifty-two".