247389901 has 4 divisors (see below), whose sum is σ = 269879904. Its totient is φ = 224899900.

The previous prime is 247389893. The next prime is 247389907. The reversal of 247389901 is 109983742.

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 247389901 - 2³ = 247389893 is a prime.

It is a super-2 number, since 2×247389901² = 122403526233579602, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (247389907) 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, 11244985 + ... + 11245006.

It is an arithmetic number, because the mean of its divisors is an integer number (67469976).

Almost surely, 2^247389901 is an apocalyptic number.

It is an amenable number.

247389901 is a deficient number, since it is larger than the sum of its proper divisors (22490003).

247389901 is a wasteful number, since it uses less digits than its factorization.

247389901 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22490002.

The product of its (nonzero) digits is 108864, while the sum is 43.

The square root of 247389901 is about 15728.6331573980. The cubic root of 247389901 is about 627.7605049491.

The spelling of 247389901 in words is "two hundred forty-seven million, three hundred eighty-nine thousand, nine hundred one".