1540370099 has 4 divisors (see below), whose sum is σ = 1607342736. Its totient is φ = 1473397464.

The previous prime is 1540370087. The next prime is 1540370101. The reversal of 1540370099 is 9900730451.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 9900730451 = 257 ⋅38524243.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1540370099 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1540370059) 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 in 3 ways as a sum of consecutive naturals, for example, 33486284 + ... + 33486329.

It is an arithmetic number, because the mean of its divisors is an integer number (401835684).

Almost surely, 2^1540370099 is an apocalyptic number.

1540370099 is a deficient number, since it is larger than the sum of its proper divisors (66972637).

1540370099 is an equidigital number, since it uses as much as digits as its factorization.

1540370099 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 66972636.

The product of its (nonzero) digits is 34020, while the sum is 38.

The square root of 1540370099 is about 39247.5489553169. The cubic root of 1540370099 is about 1154.8928516383.

The spelling of 1540370099 in words is "one billion, five hundred forty million, three hundred seventy thousand, ninety-nine".