99780146 has 4 divisors (see below), whose sum is σ = 149670222. Its totient is φ = 49890072.

The previous prime is 99780143. The next prime is 99780169. The reversal of 99780146 is 64108799.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 64108799 = 47 ⋅1364017.

It can be written as a sum of positive squares in only one way, i.e., 99780121 + 25 = 9989^2 + 5^2 .

It is a junction number, because it is equal to n+sod(n) for n = 99780097 and 99780106.

It is not an unprimeable number, because it can be changed into a prime (99780143) 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, 24945035 + ... + 24945038.

Almost surely, 2^99780146 is an apocalyptic number.

99780146 is a deficient number, since it is larger than the sum of its proper divisors (49890076).

99780146 is a wasteful number, since it uses less digits than its factorization.

99780146 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 49890075.

The product of its (nonzero) digits is 108864, while the sum is 44.

The square root of 99780146 is about 9989.0012513764. The cubic root of 99780146 is about 463.8184764827.

The spelling of 99780146 in words is "ninety-nine million, seven hundred eighty thousand, one hundred forty-six".