42969899 has 4 divisors (see below), whose sum is σ = 49108464. Its totient is φ = 36831336.

The previous prime is 42969893. The next prime is 42969929. The reversal of 42969899 is 99896924.

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

It is a cyclic number.

It is not a de Polignac number, because 42969899 - 2²⁰ = 41921323 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (42969893) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3069272 + ... + 3069285.

It is an arithmetic number, because the mean of its divisors is an integer number (12277116).

Almost surely, 2^42969899 is an apocalyptic number.

42969899 is a deficient number, since it is larger than the sum of its proper divisors (6138565).

42969899 is an equidigital number, since it uses as much as digits as its factorization.

42969899 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6138564.

The product of its digits is 2519424, while the sum is 56.

The square root of 42969899 is about 6555.1429427588. The cubic root of 42969899 is about 350.2580382854.

Subtracting 42969899 from its reverse (99896924), we obtain a square (56927025 = 7545²).

The spelling of 42969899 in words is "forty-two million, nine hundred sixty-nine thousand, eight hundred ninety-nine".