99470981 has 4 divisors (see below), whose sum is σ = 99493152. Its totient is φ = 99448812.

The previous prime is 99470963. The next prime is 99470989. The reversal of 99470981 is 18907499.

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 a cyclic number.

It is not a de Polignac number, because 99470981 - 2¹⁰ = 99469957 is a prime.

It is a super-2 number, since 2×99470981² = 19788952122204722, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (99470989) 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, 1715 + ... + 14208.

It is an arithmetic number, because the mean of its divisors is an integer number (24873288).

Almost surely, 2^99470981 is an apocalyptic number.

It is an amenable number.

99470981 is a deficient number, since it is larger than the sum of its proper divisors (22171).

99470981 is a wasteful number, since it uses less digits than its factorization.

99470981 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22170.

The product of its (nonzero) digits is 163296, while the sum is 47.

The square root of 99470981 is about 9973.5139745227. The cubic root of 99470981 is about 463.3389395431.

The spelling of 99470981 in words is "ninety-nine million, four hundred seventy thousand, nine hundred eighty-one".