1497149561 has 2 divisors, whose sum is σ = 1497149562. Its totient is φ = 1497149560.

The previous prime is 1497149551. The next prime is 1497149567. The reversal of 1497149561 is 1659417941.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1207979536 + 289170025 = 34756^2 + 17005^2 .

It is a cyclic number.

It is not a de Polignac number, because 1497149561 - 2⁶ = 1497149497 is a prime.

It is not a weakly prime, because it can be changed into another prime (1497149567) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 748574780 + 748574781.

It is an arithmetic number, because the mean of its divisors is an integer number (748574781).

Almost surely, 2^1497149561 is an apocalyptic number.

It is an amenable number.

1497149561 is a deficient number, since it is larger than the sum of its proper divisors (1).

1497149561 is an equidigital number, since it uses as much as digits as its factorization.

1497149561 is an evil number, because the sum of its binary digits is even.

The product of its digits is 272160, while the sum is 47.

The square root of 1497149561 is about 38693.0169539673. The cubic root of 1497149561 is about 1143.9886854086.

The spelling of 1497149561 in words is "one billion, four hundred ninety-seven million, one hundred forty-nine thousand, five hundred sixty-one".