99619142 has 16 divisors (see below), whose sum is σ = 171723552. Its totient is φ = 42456960.

The previous prime is 99619127. The next prime is 99619153. The reversal of 99619142 is 24191699.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 99619142.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 17123 + ... + 22190.

It is an arithmetic number, because the mean of its divisors is an integer number (10732722).

Almost surely, 2^99619142 is an apocalyptic number.

99619142 is a deficient number, since it is larger than the sum of its proper divisors (72104410).

99619142 is a wasteful number, since it uses less digits than its factorization.

99619142 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39503.

The product of its digits is 34992, while the sum is 41.

The square root of 99619142 is about 9980.9389337877. The cubic root of 99619142 is about 463.5688716105.

It can be divided in two parts, 9961914 and 2, that multiplied together give a triangular number (19923828 = T₆₃₁₂).

The spelling of 99619142 in words is "ninety-nine million, six hundred nineteen thousand, one hundred forty-two".