102311197 has 2 divisors, whose sum is σ = 102311198. Its totient is φ = 102311196.

The previous prime is 102311177. The next prime is 102311201. The reversal of 102311197 is 791113201.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 70207641 + 32103556 = 8379^2 + 5666^2 .

It is a cyclic number.

It is not a de Polignac number, because 102311197 - 2²³ = 93922589 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (102311137) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 51155598 + 51155599.

It is an arithmetic number, because the mean of its divisors is an integer number (51155599).

Almost surely, 2^102311197 is an apocalyptic number.

It is an amenable number.

102311197 is a deficient number, since it is larger than the sum of its proper divisors (1).

102311197 is an equidigital number, since it uses as much as digits as its factorization.

102311197 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 378, while the sum is 25.

The square root of 102311197 is about 10114.8997523455. The cubic root of 102311197 is about 467.7075586118.

Adding to 102311197 its reverse (791113201), we get a palindrome (893424398).

The spelling of 102311197 in words is "one hundred two million, three hundred eleven thousand, one hundred ninety-seven".