2805142997 has 4 divisors (see below), whose sum is σ = 2927105760. Its totient is φ = 2683180236.

The previous prime is 2805142933. The next prime is 2805143039. The reversal of 2805142997 is 7992415082.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 7992415082 = 2 ⋅3996207541.

It is a cyclic number.

It is not a de Polignac number, because 2805142997 - 2⁶ = 2805142933 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2805142097) 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, 60981347 + ... + 60981392.

It is an arithmetic number, because the mean of its divisors is an integer number (731776440).

Almost surely, 2^2805142997 is an apocalyptic number.

It is an amenable number.

2805142997 is a deficient number, since it is larger than the sum of its proper divisors (121962763).

2805142997 is a wasteful number, since it uses less digits than its factorization.

2805142997 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 121962762.

The product of its (nonzero) digits is 362880, while the sum is 47.

The square root of 2805142997 is about 52963.6006800897. The cubic root of 2805142997 is about 1410.3221766011.

The spelling of 2805142997 in words is "two billion, eight hundred five million, one hundred forty-two thousand, nine hundred ninety-seven".