1491736153 has 2 divisors, whose sum is σ = 1491736154. Its totient is φ = 1491736152.

The previous prime is 1491736123. The next prime is 1491736217. The reversal of 1491736153 is 3516371941.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1220244624 + 271491529 = 34932^2 + 16477^2 .

It is a cyclic number.

It is not a de Polignac number, because 1491736153 - 2¹⁷ = 1491605081 is a prime.

It is not a weakly prime, because it can be changed into another prime (1491736123) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 745868076 + 745868077.

It is an arithmetic number, because the mean of its divisors is an integer number (745868077).

Almost surely, 2^1491736153 is an apocalyptic number.

It is an amenable number.

1491736153 is a deficient number, since it is larger than the sum of its proper divisors (1).

1491736153 is an equidigital number, since it uses as much as digits as its factorization.

1491736153 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 68040, while the sum is 40.

The square root of 1491736153 is about 38623.0003106957. Note that the first 3 decimals coincide. The cubic root of 1491736153 is about 1142.6082050651.

The spelling of 1491736153 in words is "one billion, four hundred ninety-one million, seven hundred thirty-six thousand, one hundred fifty-three".