42479669 has 2 divisors, whose sum is σ = 42479670. Its totient is φ = 42479668.

The previous prime is 42479627. The next prime is 42479677. The reversal of 42479669 is 96697424.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 25381444 + 17098225 = 5038^2 + 4135^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-42479669 is a prime.

It is a super-2 number, since 2×42479669² = 3609044556699122, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (42479699) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21239834 + 21239835.

It is an arithmetic number, because the mean of its divisors is an integer number (21239835).

Almost surely, 2^42479669 is an apocalyptic number.

It is an amenable number.

42479669 is a deficient number, since it is larger than the sum of its proper divisors (1).

42479669 is an equidigital number, since it uses as much as digits as its factorization.

42479669 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 653184, while the sum is 47.

The square root of 42479669 is about 6517.6429021541. The cubic root of 42479669 is about 348.9209460712.

The spelling of 42479669 in words is "forty-two million, four hundred seventy-nine thousand, six hundred sixty-nine".