247023157 has 2 divisors, whose sum is σ = 247023158. Its totient is φ = 247023156.

The previous prime is 247023113. The next prime is 247023173. The reversal of 247023157 is 751320742.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 237344836 + 9678321 = 15406^2 + 3111^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-247023157 is a prime.

It is a super-2 number, since 2×247023157² = 122040880188493298, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (247020157) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 123511578 + 123511579.

It is an arithmetic number, because the mean of its divisors is an integer number (123511579).

Almost surely, 2^247023157 is an apocalyptic number.

It is an amenable number.

247023157 is a deficient number, since it is larger than the sum of its proper divisors (1).

247023157 is an equidigital number, since it uses as much as digits as its factorization.

247023157 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 11760, while the sum is 31.

The square root of 247023157 is about 15716.9703505478. The cubic root of 247023157 is about 627.4501429677.

Adding to 247023157 its reverse (751320742), we get a palindrome (998343899).

The spelling of 247023157 in words is "two hundred forty-seven million, twenty-three thousand, one hundred fifty-seven".