1431651649 has 2 divisors, whose sum is σ = 1431651650. Its totient is φ = 1431651648.

The previous prime is 1431651623. The next prime is 1431651673. The reversal of 1431651649 is 9461561341.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1416167424 + 15484225 = 37632^2 + 3935^2 .

It is a cyclic number.

It is not a de Polignac number, because 1431651649 - 2⁷ = 1431651521 is a prime.

It is not a weakly prime, because it can be changed into another prime (1431651679) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 715825824 + 715825825.

It is an arithmetic number, because the mean of its divisors is an integer number (715825825).

Almost surely, 2^1431651649 is an apocalyptic number.

It is an amenable number.

1431651649 is a deficient number, since it is larger than the sum of its proper divisors (1).

1431651649 is an equidigital number, since it uses as much as digits as its factorization.

1431651649 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 77760, while the sum is 40.

The square root of 1431651649 is about 37837.1728462897. The cubic root of 1431651649 is about 1127.0567541065.

The spelling of 1431651649 in words is "one billion, four hundred thirty-one million, six hundred fifty-one thousand, six hundred forty-nine".