870011157 has 4 divisors (see below), whose sum is σ = 1160014880. Its totient is φ = 580007436.

The previous prime is 870011143. The next prime is 870011171. The reversal of 870011157 is 751110078.

It is a happy number.

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.

It is an interprime number because it is at equal distance from previous prime (870011143) and next prime (870011171).

It is not a de Polignac number, because 870011157 - 2⁷ = 870011029 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 (870011557) 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, 145001857 + ... + 145001862.

It is an arithmetic number, because the mean of its divisors is an integer number (290003720).

Almost surely, 2^870011157 is an apocalyptic number.

It is an amenable number.

870011157 is a deficient number, since it is larger than the sum of its proper divisors (290003723).

870011157 is a wasteful number, since it uses less digits than its factorization.

870011157 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 290003722.

The product of its (nonzero) digits is 1960, while the sum is 30.

The square root of 870011157 is about 29495.9515357616. The cubic root of 870011157 is about 954.6443517314.

The spelling of 870011157 in words is "eight hundred seventy million, eleven thousand, one hundred fifty-seven".