1454791661 has 2 divisors, whose sum is σ = 1454791662. Its totient is φ = 1454791660.

The previous prime is 1454791651. The next prime is 1454791687. The reversal of 1454791661 is 1661974541.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 885062500 + 569729161 = 29750^2 + 23869^2 .

It is a cyclic number.

It is not a de Polignac number, because 1454791661 - 2¹⁰ = 1454790637 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1454791621) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 727395830 + 727395831.

It is an arithmetic number, because the mean of its divisors is an integer number (727395831).

Almost surely, 2^1454791661 is an apocalyptic number.

It is an amenable number.

1454791661 is a deficient number, since it is larger than the sum of its proper divisors (1).

1454791661 is an equidigital number, since it uses as much as digits as its factorization.

1454791661 is an evil number, because the sum of its binary digits is even.

The product of its digits is 181440, while the sum is 44.

The square root of 1454791661 is about 38141.7312270956. The cubic root of 1454791661 is about 1133.0965946021.

The spelling of 1454791661 in words is "one billion, four hundred fifty-four million, seven hundred ninety-one thousand, six hundred sixty-one".