73870857 has 6 divisors (see below), whose sum is σ = 106702362. Its totient is φ = 49247232.

The previous prime is 73870843. The next prime is 73870873. The reversal of 73870857 is 75807837.

It can be written as a sum of positive squares in only one way, i.e., 61402896 + 12467961 = 7836^2 + 3531^2 .

It is not a de Polignac number, because 73870857 - 2¹⁸ = 73608713 is a prime.

It is not an unprimeable number, because it can be changed into a prime (73870877) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 4103928 + ... + 4103945.

It is an arithmetic number, because the mean of its divisors is an integer number (17783727).

Almost surely, 2^73870857 is an apocalyptic number.

It is an amenable number.

73870857 is a deficient number, since it is larger than the sum of its proper divisors (32831505).

73870857 is a wasteful number, since it uses less digits than its factorization.

73870857 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8207879 (or 8207876 counting only the distinct ones).

The product of its (nonzero) digits is 329280, while the sum is 45.

The square root of 73870857 is about 8594.8157048304. The cubic root of 73870857 is about 419.5892753475.

The spelling of 73870857 in words is "seventy-three million, eight hundred seventy thousand, eight hundred fifty-seven".