102440207 has 2 divisors, whose sum is σ = 102440208. Its totient is φ = 102440206.

The previous prime is 102440201. The next prime is 102440227. The reversal of 102440207 is 702044201.

It is an a-pointer prime, because the next prime (102440227) can be obtained adding 102440207 to its sum of digits (20).

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-102440207 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (102440201) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 51220103 + 51220104.

It is an arithmetic number, because the mean of its divisors is an integer number (51220104).

Almost surely, 2^102440207 is an apocalyptic number.

102440207 is a deficient number, since it is larger than the sum of its proper divisors (1).

102440207 is an equidigital number, since it uses as much as digits as its factorization.

102440207 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 448, while the sum is 20.

The square root of 102440207 is about 10121.2749690936. The cubic root of 102440207 is about 467.9040623835.

Adding to 102440207 its reverse (702044201), we get a palindrome (804484408).

The spelling of 102440207 in words is "one hundred two million, four hundred forty thousand, two hundred seven".