10240397 has 2 divisors, whose sum is σ = 10240398. Its totient is φ = 10240396.

The previous prime is 10240369. The next prime is 10240423. The reversal of 10240397 is 79304201.

It is an a-pointer prime, because the next prime (10240423) can be obtained adding 10240397 to its sum of digits (26).

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 9947716 + 292681 = 3154^2 + 541^2 .

It is a cyclic number.

It is not a de Polignac number, because 10240397 - 2⁸ = 10240141 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (10240327) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5120198 + 5120199.

It is an arithmetic number, because the mean of its divisors is an integer number (5120199).

Almost surely, 2^10240397 is an apocalyptic number.

It is an amenable number.

10240397 is a deficient number, since it is larger than the sum of its proper divisors (1).

10240397 is an equidigital number, since it uses as much as digits as its factorization.

10240397 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1512, while the sum is 26.

The square root of 10240397 is about 3200.0620306488. The cubic root of 10240397 is about 217.1562156033.

Adding to 10240397 its reverse (79304201), we get a palindrome (89544598).

The spelling of 10240397 in words is "ten million, two hundred forty thousand, three hundred ninety-seven".