99943425 has 108 divisors (see below), whose sum is σ = 200428020. Its totient is φ = 47523840.

The previous prime is 99943409. The next prime is 99943433. The reversal of 99943425 is 52434999.

It is a happy number.

It can be written as a sum of positive squares in 18 ways, for example, as 23415921 + 76527504 = 4839^2 + 8748^2 .

It is not a de Polignac number, because 99943425 - 2⁴ = 99943409 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 107 ways as a sum of consecutive naturals, for example, 1885699 + ... + 1885751.

It is an arithmetic number, because the mean of its divisors is an integer number (1855815).

Almost surely, 2^99943425 is an apocalyptic number.

It is an amenable number.

99943425 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

99943425 is a wasteful number, since it uses less digits than its factorization.

99943425 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 132 (or 107 counting only the distinct ones).

The product of its digits is 349920, while the sum is 45.

The square root of 99943425 is about 9997.1708497955. The cubic root of 99943425 is about 464.0713342195.

The spelling of 99943425 in words is "ninety-nine million, nine hundred forty-three thousand, four hundred twenty-five".