247204397 has 4 divisors (see below), whose sum is σ = 269677536. Its totient is φ = 224731260.

The previous prime is 247204369. The next prime is 247204427. The reversal of 247204397 is 793402742.

247204397 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 247204397 - 2¹⁰ = 247203373 is a prime.

It is a super-2 number, since 2×247204397² = 122220027792267218, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 247204397.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (247204297) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11236553 + ... + 11236574.

It is an arithmetic number, because the mean of its divisors is an integer number (67419384).

Almost surely, 2^247204397 is an apocalyptic number.

It is an amenable number.

247204397 is a deficient number, since it is larger than the sum of its proper divisors (22473139).

247204397 is a wasteful number, since it uses less digits than its factorization.

247204397 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22473138.

The product of its (nonzero) digits is 84672, while the sum is 38.

The square root of 247204397 is about 15722.7350356101. The cubic root of 247204397 is about 627.6035580899.

The spelling of 247204397 in words is "two hundred forty-seven million, two hundred four thousand, three hundred ninety-seven".