99919970 has 8 divisors (see below), whose sum is σ = 179855964. Its totient is φ = 39967984.

The previous prime is 99919969. The next prime is 99919997. The reversal of 99919970 is 7991999.

It can be written as a sum of positive squares in 2 ways, for example, as 88717561 + 11202409 = 9419^2 + 3347^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

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 in 3 ways as a sum of consecutive naturals, for example, 4995989 + ... + 4996008.

Almost surely, 2^99919970 is an apocalyptic number.

99919970 is a deficient number, since it is larger than the sum of its proper divisors (79935994).

99919970 is a wasteful number, since it uses less digits than its factorization.

99919970 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9992004.

The product of its (nonzero) digits is 413343, while the sum is 53.

The square root of 99919970 is about 9995.9976990794. The cubic root of 99919970 is about 464.0350281969.

The spelling of 99919970 in words is "ninety-nine million, nine hundred nineteen thousand, nine hundred seventy".