7857875137 has 4 divisors (see below), whose sum is σ = 8980428736. Its totient is φ = 6735321540.

The previous prime is 7857875101. The next prime is 7857875141. The reversal of 7857875137 is 7315787587.

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: 7315787587 = 6047 ⋅1209821.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-7857875137 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (7857873137) 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, 561276789 + ... + 561276802.

It is an arithmetic number, because the mean of its divisors is an integer number (2245107184).

Almost surely, 2^7857875137 is an apocalyptic number.

It is an amenable number.

7857875137 is a deficient number, since it is larger than the sum of its proper divisors (1122553599).

7857875137 is a wasteful number, since it uses less digits than its factorization.

7857875137 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1122553598.

The product of its digits is 11524800, while the sum is 58.

The square root of 7857875137 is about 88644.6565620286. The cubic root of 7857875137 is about 1988.0854238002.

The spelling of 7857875137 in words is "seven billion, eight hundred fifty-seven million, eight hundred seventy-five thousand, one hundred thirty-seven".