42949739 has 4 divisors (see below), whose sum is σ = 49085424. Its totient is φ = 36814056.

The previous prime is 42949729. The next prime is 42949789. The reversal of 42949739 is 93794924.

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 42949739 - 2⁴ = 42949723 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 42949693 and 42949702.

It is not an unprimeable number, because it can be changed into a prime (42949729) 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, 3067832 + ... + 3067845.

It is an arithmetic number, because the mean of its divisors is an integer number (12271356).

Almost surely, 2^42949739 is an apocalyptic number.

42949739 is a deficient number, since it is larger than the sum of its proper divisors (6135685).

42949739 is an equidigital number, since it uses as much as digits as its factorization.

42949739 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6135684.

The product of its digits is 489888, while the sum is 47.

The square root of 42949739 is about 6553.6050384502. The cubic root of 42949739 is about 350.2032533716.

The spelling of 42949739 in words is "forty-two million, nine hundred forty-nine thousand, seven hundred thirty-nine".