98811857 has 4 divisors (see below), whose sum is σ = 100062720. Its totient is φ = 97560996.

The previous prime is 98811829. The next prime is 98811877. The reversal of 98811857 is 75811889.

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: 75811889 = 53 ⋅1430413.

It is a cyclic number.

It is not a de Polignac number, because 98811857 - 2¹⁶ = 98746321 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (98811877) 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, 625313 + ... + 625470.

It is an arithmetic number, because the mean of its divisors is an integer number (25015680).

Almost surely, 2^98811857 is an apocalyptic number.

It is an amenable number.

98811857 is a deficient number, since it is larger than the sum of its proper divisors (1250863).

98811857 is a wasteful number, since it uses less digits than its factorization.

98811857 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1250862.

The product of its digits is 161280, while the sum is 47.

The square root of 98811857 is about 9940.4153333752. The cubic root of 98811857 is about 462.3132639866.

The spelling of 98811857 in words is "ninety-eight million, eight hundred eleven thousand, eight hundred fifty-seven".