247299945 has 8 divisors (see below), whose sum is σ = 395679936. Its totient is φ = 131893296.

The previous prime is 247299937. The next prime is 247299967. The reversal of 247299945 is 549992742.

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

It is not a de Polignac number, because 247299945 - 2³ = 247299937 is a prime.

It is a super-2 number, since 2×247299945² = 122314525594006050, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8243317 + ... + 8243346.

It is an arithmetic number, because the mean of its divisors is an integer number (49459992).

Almost surely, 2^247299945 is an apocalyptic number.

It is an amenable number.

247299945 is a deficient number, since it is larger than the sum of its proper divisors (148379991).

247299945 is a wasteful number, since it uses less digits than its factorization.

247299945 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16486671.

The product of its digits is 1632960, while the sum is 51.

The square root of 247299945 is about 15725.7732719253. The cubic root of 247299945 is about 627.6844068952.

The spelling of 247299945 in words is "two hundred forty-seven million, two hundred ninety-nine thousand, nine hundred forty-five".