99971000 has 32 divisors (see below), whose sum is σ = 233934480. Its totient is φ = 39988000.

The previous prime is 99970993. The next prime is 99971017. The reversal of 99971000 is 17999.

It is a happy number.

It is a nialpdrome in base 10.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 48986 + ... + 50985.

Almost surely, 2^99971000 is an apocalyptic number.

It is an amenable number.

99971000 is an abundant number, since it is smaller than the sum of its proper divisors (133963480).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

99971000 is a wasteful number, since it uses less digits than its factorization.

99971000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 99992 (or 99978 counting only the distinct ones).

The product of its (nonzero) digits is 5103, while the sum is 35.

The square root of 99971000 is about 9998.5498948598. The cubic root of 99971000 is about 464.1140103312.

Adding to 99971000 its reverse (17999), we get a palindrome (99988999).

The spelling of 99971000 in words is "ninety-nine million, nine hundred seventy-one thousand".