1570740491 has 2 divisors, whose sum is σ = 1570740492. Its totient is φ = 1570740490.

The previous prime is 1570740481. The next prime is 1570740499. The reversal of 1570740491 is 1940470751.

It is a strong prime.

It is an emirp because it is prime and its reverse (1940470751) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1570740491 is a prime.

It is not a weakly prime, because it can be changed into another prime (1570740499) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 785370245 + 785370246.

It is an arithmetic number, because the mean of its divisors is an integer number (785370246).

Almost surely, 2^1570740491 is an apocalyptic number.

1570740491 is a deficient number, since it is larger than the sum of its proper divisors (1).

1570740491 is an equidigital number, since it uses as much as digits as its factorization.

1570740491 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 35280, while the sum is 38.

The square root of 1570740491 is about 39632.5685642503. The cubic root of 1570740491 is about 1162.4335778290.

The spelling of 1570740491 in words is "one billion, five hundred seventy million, seven hundred forty thousand, four hundred ninety-one".