247158389 has 2 divisors, whose sum is σ = 247158390. Its totient is φ = 247158388.

The previous prime is 247158371. The next prime is 247158419. The reversal of 247158389 is 983851742.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 245079025 + 2079364 = 15655^2 + 1442^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-247158389 is a prime.

It is a super-2 number, since 2×247158389² = 122174538506150642, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (247158089) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 123579194 + 123579195.

It is an arithmetic number, because the mean of its divisors is an integer number (123579195).

Almost surely, 2^247158389 is an apocalyptic number.

It is an amenable number.

247158389 is a deficient number, since it is larger than the sum of its proper divisors (1).

247158389 is an equidigital number, since it uses as much as digits as its factorization.

247158389 is an evil number, because the sum of its binary digits is even.

The product of its digits is 483840, while the sum is 47.

The square root of 247158389 is about 15721.2718633067. The cubic root of 247158389 is about 627.5646205732.

The spelling of 247158389 in words is "two hundred forty-seven million, one hundred fifty-eight thousand, three hundred eighty-nine".