42279399 has 6 divisors (see below), whose sum is σ = 61070256. Its totient is φ = 28186260.

The previous prime is 42279383. The next prime is 42279401. The reversal of 42279399 is 99397224.

It is not a de Polignac number, because 42279399 - 2⁴ = 42279383 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42279599) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2348847 + ... + 2348864.

It is an arithmetic number, because the mean of its divisors is an integer number (10178376).

Almost surely, 2^42279399 is an apocalyptic number.

42279399 is a deficient number, since it is larger than the sum of its proper divisors (18790857).

42279399 is a wasteful number, since it uses less digits than its factorization.

42279399 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4697717 (or 4697714 counting only the distinct ones).

The product of its digits is 244944, while the sum is 45.

The square root of 42279399 is about 6502.2610682746. The cubic root of 42279399 is about 348.3717539382.

The spelling of 42279399 in words is "forty-two million, two hundred seventy-nine thousand, three hundred ninety-nine".