1540998929 has 2 divisors, whose sum is σ = 1540998930. Its totient is φ = 1540998928.

The previous prime is 1540998923. The next prime is 1540998931. The reversal of 1540998929 is 9298990451.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1019333329 + 521665600 = 31927^2 + 22840^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1540998929 is a prime.

Together with 1540998931, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (1540998923) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 770499464 + 770499465.

It is an arithmetic number, because the mean of its divisors is an integer number (770499465).

Almost surely, 2^1540998929 is an apocalyptic number.

It is an amenable number.

1540998929 is a deficient number, since it is larger than the sum of its proper divisors (1).

1540998929 is an equidigital number, since it uses as much as digits as its factorization.

1540998929 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2099520, while the sum is 56.

The square root of 1540998929 is about 39255.5592114034. The cubic root of 1540998929 is about 1155.0499854057.

The spelling of 1540998929 in words is "one billion, five hundred forty million, nine hundred ninety-eight thousand, nine hundred twenty-nine".