2542343957 has 4 divisors (see below), whose sum is σ = 2630011020. Its totient is φ = 2454676896.

The previous prime is 2542343879. The next prime is 2542343959. The reversal of 2542343957 is 7593432452.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 714439441 + 1827904516 = 26729^2 + 42754^2 .

It is a cyclic number.

It is not a de Polignac number, because 2542343957 - 2²⁰ = 2541295381 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 (2542343959) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 43833488 + ... + 43833545.

It is an arithmetic number, because the mean of its divisors is an integer number (657502755).

Almost surely, 2^2542343957 is an apocalyptic number.

It is an amenable number.

2542343957 is a deficient number, since it is larger than the sum of its proper divisors (87667063).

2542343957 is an equidigital number, since it uses as much as digits as its factorization.

2542343957 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 87667062.

The product of its digits is 907200, while the sum is 44.

The square root of 2542343957 is about 50421.6615850767. The cubic root of 2542343957 is about 1364.8285609892.

The spelling of 2542343957 in words is "two billion, five hundred forty-two million, three hundred forty-three thousand, nine hundred fifty-seven".