42921677 has 2 divisors, whose sum is σ = 42921678. Its totient is φ = 42921676.

The previous prime is 42921643. The next prime is 42921691. The reversal of 42921677 is 77612924.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 37773316 + 5148361 = 6146^2 + 2269^2 .

It is a cyclic number.

It is not a de Polignac number, because 42921677 - 2¹⁰ = 42920653 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 42921677.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (42923677) by changing a digit.

It is a good prime.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21460838 + 21460839.

It is an arithmetic number, because the mean of its divisors is an integer number (21460839).

Almost surely, 2^42921677 is an apocalyptic number.

It is an amenable number.

42921677 is a deficient number, since it is larger than the sum of its proper divisors (1).

42921677 is an equidigital number, since it uses as much as digits as its factorization.

42921677 is an evil number, because the sum of its binary digits is even.

The product of its digits is 42336, while the sum is 38.

The square root of 42921677 is about 6551.4637295798. The cubic root of 42921677 is about 350.1269661810.

The spelling of 42921677 in words is "forty-two million, nine hundred twenty-one thousand, six hundred seventy-seven".