1491319699 has 2 divisors, whose sum is σ = 1491319700. Its totient is φ = 1491319698.

The previous prime is 1491319657. The next prime is 1491319703. The reversal of 1491319699 is 9969131941.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1491319699 - 2¹⁵ = 1491286931 is a prime.

It is not a weakly prime, because it can be changed into another prime (1491319099) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 745659849 + 745659850.

It is an arithmetic number, because the mean of its divisors is an integer number (745659850).

Almost surely, 2^1491319699 is an apocalyptic number.

1491319699 is a deficient number, since it is larger than the sum of its proper divisors (1).

1491319699 is an equidigital number, since it uses as much as digits as its factorization.

1491319699 is an evil number, because the sum of its binary digits is even.

The product of its digits is 472392, while the sum is 52.

The square root of 1491319699 is about 38617.6086649601. The cubic root of 1491319699 is about 1142.5018663214.

The spelling of 1491319699 in words is "one billion, four hundred ninety-one million, three hundred nineteen thousand, six hundred ninety-nine".