65131249 has 2 divisors, whose sum is σ = 65131250. Its totient is φ = 65131248.

The previous prime is 65131243. The next prime is 65131271. The reversal of 65131249 is 94213156.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 33005025 + 32126224 = 5745^2 + 5668^2 .

It is a cyclic number.

It is not a de Polignac number, because 65131249 - 2¹³ = 65123057 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 65131249.

It is not a weakly prime, because it can be changed into another prime (65131243) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32565624 + 32565625.

It is an arithmetic number, because the mean of its divisors is an integer number (32565625).

Almost surely, 2^65131249 is an apocalyptic number.

It is an amenable number.

65131249 is a deficient number, since it is larger than the sum of its proper divisors (1).

65131249 is an equidigital number, since it uses as much as digits as its factorization.

65131249 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 6480, while the sum is 31.

The square root of 65131249 is about 8070.3933609211. The cubic root of 65131249 is about 402.3430176241.

The spelling of 65131249 in words is "sixty-five million, one hundred thirty-one thousand, two hundred forty-nine".