42619649 has 4 divisors (see below), whose sum is σ = 43033536. Its totient is φ = 42205764.

The previous prime is 42619639. The next prime is 42619651. The reversal of 42619649 is 94691624.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 42619649 - 2⁸ = 42619393 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (42619609) 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, 206789 + ... + 206994.

It is an arithmetic number, because the mean of its divisors is an integer number (10758384).

Almost surely, 2^42619649 is an apocalyptic number.

It is an amenable number.

42619649 is a deficient number, since it is larger than the sum of its proper divisors (413887).

42619649 is a wasteful number, since it uses less digits than its factorization.

42619649 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 413886.

The product of its digits is 93312, while the sum is 41.

The square root of 42619649 is about 6528.3726149784. The cubic root of 42619649 is about 349.3037833578.

The spelling of 42619649 in words is "forty-two million, six hundred nineteen thousand, six hundred forty-nine".