247642937 has 8 divisors (see below), whose sum is σ = 251311104. Its totient is φ = 243982368.

The previous prime is 247642907. The next prime is 247642939. The reversal of 247642937 is 739246742.

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 247642937 - 2⁶ = 247642873 is a prime.

It is a super-2 number, since 2×247642937² = 122654048491971938, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (247642939) 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, 114488 + ... + 116630.

It is an arithmetic number, because the mean of its divisors is an integer number (31413888).

Almost surely, 2^247642937 is an apocalyptic number.

It is an amenable number.

247642937 is a deficient number, since it is larger than the sum of its proper divisors (3668167).

247642937 is a wasteful number, since it uses less digits than its factorization.

247642937 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3799.

The product of its digits is 508032, while the sum is 44.

The square root of 247642937 is about 15736.6749029139. The cubic root of 247642937 is about 627.9744612452.

The spelling of 247642937 in words is "two hundred forty-seven million, six hundred forty-two thousand, nine hundred thirty-seven".