1431661249 has 2 divisors, whose sum is σ = 1431661250. Its totient is φ = 1431661248.

The previous prime is 1431661213. The next prime is 1431661271. The reversal of 1431661249 is 9421661341.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1027651249 + 404010000 = 32057^2 + 20100^2 .

It is a cyclic number.

It is not a de Polignac number, because 1431661249 - 2¹⁹ = 1431136961 is a prime.

It is not a weakly prime, because it can be changed into another prime (1431661549) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 715830624 + 715830625.

It is an arithmetic number, because the mean of its divisors is an integer number (715830625).

Almost surely, 2^1431661249 is an apocalyptic number.

It is an amenable number.

1431661249 is a deficient number, since it is larger than the sum of its proper divisors (1).

1431661249 is an equidigital number, since it uses as much as digits as its factorization.

1431661249 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 31104, while the sum is 37.

The square root of 1431661249 is about 37837.2997054494. The cubic root of 1431661249 is about 1127.0592732762.

The spelling of 1431661249 in words is "one billion, four hundred thirty-one million, six hundred sixty-one thousand, two hundred forty-nine".