761818249 has 2 divisors, whose sum is σ = 761818250. Its totient is φ = 761818248.

The previous prime is 761818247. The next prime is 761818261. The reversal of 761818249 is 942818167.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 651883024 + 109935225 = 25532^2 + 10485^2 .

It is a cyclic number.

It is not a de Polignac number, because 761818249 - 2¹ = 761818247 is a prime.

Together with 761818247, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 761818199 and 761818208.

It is not a weakly prime, because it can be changed into another prime (761818241) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 380909124 + 380909125.

It is an arithmetic number, because the mean of its divisors is an integer number (380909125).

Almost surely, 2^761818249 is an apocalyptic number.

It is an amenable number.

761818249 is a deficient number, since it is larger than the sum of its proper divisors (1).

761818249 is an equidigital number, since it uses as much as digits as its factorization.

761818249 is an evil number, because the sum of its binary digits is even.

The product of its digits is 193536, while the sum is 46.

The square root of 761818249 is about 27601.0552153355. The cubic root of 761818249 is about 913.3077100306.

The spelling of 761818249 in words is "seven hundred sixty-one million, eight hundred eighteen thousand, two hundred forty-nine".