1493557291 has 2 divisors, whose sum is σ = 1493557292. Its totient is φ = 1493557290.

The previous prime is 1493557283. The next prime is 1493557309. The reversal of 1493557291 is 1927553941.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1493557291 - 2³ = 1493557283 is a prime.

It is not a weakly prime, because it can be changed into another prime (1493557201) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 746778645 + 746778646.

It is an arithmetic number, because the mean of its divisors is an integer number (746778646).

Almost surely, 2^1493557291 is an apocalyptic number.

1493557291 is a deficient number, since it is larger than the sum of its proper divisors (1).

1493557291 is an equidigital number, since it uses as much as digits as its factorization.

1493557291 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 340200, while the sum is 46.

The square root of 1493557291 is about 38646.5689421454. The cubic root of 1493557291 is about 1143.0729881106.

The spelling of 1493557291 in words is "one billion, four hundred ninety-three million, five hundred fifty-seven thousand, two hundred ninety-one".