1330457861 has 2 divisors, whose sum is σ = 1330457862. Its totient is φ = 1330457860.

The previous prime is 1330457857. The next prime is 1330457899. The reversal of 1330457861 is 1687540331.

It is an a-pointer prime, because the next prime (1330457899) can be obtained adding 1330457861 to its sum of digits (38).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 926045761 + 404412100 = 30431^2 + 20110^2 .

It is a cyclic number.

It is not a de Polignac number, because 1330457861 - 2² = 1330457857 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1330457801) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 665228930 + 665228931.

It is an arithmetic number, because the mean of its divisors is an integer number (665228931).

Almost surely, 2^1330457861 is an apocalyptic number.

It is an amenable number.

1330457861 is a deficient number, since it is larger than the sum of its proper divisors (1).

1330457861 is an equidigital number, since it uses as much as digits as its factorization.

1330457861 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 60480, while the sum is 38.

The square root of 1330457861 is about 36475.4418890299. The cubic root of 1330457861 is about 1099.8506301311.

The spelling of 1330457861 in words is "one billion, three hundred thirty million, four hundred fifty-seven thousand, eight hundred sixty-one".