861514249 has 2 divisors, whose sum is σ = 861514250. Its totient is φ = 861514248.

The previous prime is 861514231. The next prime is 861514267. The reversal of 861514249 is 942415168.

It is a balanced prime because it is at equal distance from previous prime (861514231) and next prime (861514267).

It can be written as a sum of positive squares in only one way, i.e., 489294400 + 372219849 = 22120^2 + 19293^2 .

It is a cyclic number.

It is not a de Polignac number, because 861514249 - 2¹⁷ = 861383177 is a prime.

It is not a weakly prime, because it can be changed into another prime (861514229) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 430757124 + 430757125.

It is an arithmetic number, because the mean of its divisors is an integer number (430757125).

Almost surely, 2^861514249 is an apocalyptic number.

It is an amenable number.

861514249 is a deficient number, since it is larger than the sum of its proper divisors (1).

861514249 is an equidigital number, since it uses as much as digits as its factorization.

861514249 is an evil number, because the sum of its binary digits is even.

The product of its digits is 69120, while the sum is 40.

The square root of 861514249 is about 29351.5629737157. The cubic root of 861514249 is about 951.5263548036.

The spelling of 861514249 in words is "eight hundred sixty-one million, five hundred fourteen thousand, two hundred forty-nine".