42649379 has 4 divisors (see below), whose sum is σ = 45158184. Its totient is φ = 40140576.

The previous prime is 42649367. The next prime is 42649381. The reversal of 42649379 is 97394624.

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 42649379 - 2⁴ = 42649363 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (42649339) 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, 1254377 + ... + 1254410.

It is an arithmetic number, because the mean of its divisors is an integer number (11289546).

Almost surely, 2^42649379 is an apocalyptic number.

42649379 is a deficient number, since it is larger than the sum of its proper divisors (2508805).

42649379 is a wasteful number, since it uses less digits than its factorization.

42649379 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2508804.

The product of its digits is 326592, while the sum is 44.

The square root of 42649379 is about 6530.6492020319. The cubic root of 42649379 is about 349.3849852444.

The spelling of 42649379 in words is "forty-two million, six hundred forty-nine thousand, three hundred seventy-nine".