1457039809 has 4 divisors (see below), whose sum is σ = 1488040704. Its totient is φ = 1426038916.

The previous prime is 1457039807. The next prime is 1457039819. The reversal of 1457039809 is 9089307541.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1457039809 - 2¹ = 1457039807 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1457039807) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 15500377 + ... + 15500470.

It is an arithmetic number, because the mean of its divisors is an integer number (372010176).

Almost surely, 2^1457039809 is an apocalyptic number.

It is an amenable number.

1457039809 is a deficient number, since it is larger than the sum of its proper divisors (31000895).

1457039809 is an equidigital number, since it uses as much as digits as its factorization.

1457039809 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31000894.

The product of its (nonzero) digits is 272160, while the sum is 46.

The square root of 1457039809 is about 38171.1908250188. The cubic root of 1457039809 is about 1133.6799674320.

The spelling of 1457039809 in words is "one billion, four hundred fifty-seven million, thirty-nine thousand, eight hundred nine".