1539954897 has 16 divisors (see below), whose sum is σ = 2287467840. Its totient is φ = 914985792.

The previous prime is 1539954893. The next prime is 1539954931. The reversal of 1539954897 is 7984599351.

It is not a de Polignac number, because 1539954897 - 2² = 1539954893 is a prime.

It is a super-2 number, since 2×1539954897² = 4742922169588561218, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1539954897.

It is not an unprimeable number, because it can be changed into a prime (1539954893) 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 15 ways as a sum of consecutive naturals, for example, 679663 + ... + 681924.

It is an arithmetic number, because the mean of its divisors is an integer number (142966740).

Almost surely, 2^1539954897 is an apocalyptic number.

It is an amenable number.

1539954897 is a deficient number, since it is larger than the sum of its proper divisors (747512943).

1539954897 is a wasteful number, since it uses less digits than its factorization.

1539954897 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1361632.

The product of its digits is 12247200, while the sum is 60.

The square root of 1539954897 is about 39242.2590710576. The cubic root of 1539954897 is about 1154.7890763806.

The spelling of 1539954897 in words is "one billion, five hundred thirty-nine million, nine hundred fifty-four thousand, eight hundred ninety-seven".