99421954 has 4 divisors (see below), whose sum is σ = 149132934. Its totient is φ = 49710976.

The previous prime is 99421943. The next prime is 99421957. The reversal of 99421954 is 45912499.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 81486729 + 17935225 = 9027^2 + 4235^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 99421954.

It is not an unprimeable number, because it can be changed into a prime (99421957) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 24855487 + ... + 24855490.

Almost surely, 2^99421954 is an apocalyptic number.

99421954 is a deficient number, since it is larger than the sum of its proper divisors (49710980).

99421954 is a wasteful number, since it uses less digits than its factorization.

99421954 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 49710979.

The product of its digits is 116640, while the sum is 43.

The square root of 99421954 is about 9971.0558116982. The cubic root of 99421954 is about 463.2628039336.

The spelling of 99421954 in words is "ninety-nine million, four hundred twenty-one thousand, nine hundred fifty-four".