1540019959 has 2 divisors, whose sum is σ = 1540019960. Its totient is φ = 1540019958.

The previous prime is 1540019911. The next prime is 1540019963. The reversal of 1540019959 is 9599100451.

It is a strong prime.

It is an emirp because it is prime and its reverse (9599100451) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1540019959 - 2⁹ = 1540019447 is a prime.

It is a super-2 number, since 2×1540019959² = 4743322948236723362, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1540019909) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 770009979 + 770009980.

It is an arithmetic number, because the mean of its divisors is an integer number (770009980).

Almost surely, 2^1540019959 is an apocalyptic number.

1540019959 is a deficient number, since it is larger than the sum of its proper divisors (1).

1540019959 is an equidigital number, since it uses as much as digits as its factorization.

1540019959 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 72900, while the sum is 43.

The square root of 1540019959 is about 39243.0880410806. The cubic root of 1540019959 is about 1154.8053391575.

The spelling of 1540019959 in words is "one billion, five hundred forty million, nineteen thousand, nine hundred fifty-nine".