42137929 has 2 divisors, whose sum is σ = 42137930. Its totient is φ = 42137928.

The previous prime is 42137903. The next prime is 42137933. The reversal of 42137929 is 92973124.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 38440000 + 3697929 = 6200^2 + 1923^2 .

It is a cyclic number.

It is not a de Polignac number, because 42137929 - 2¹¹ = 42135881 is a prime.

It is not a weakly prime, because it can be changed into another prime (42137939) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21068964 + 21068965.

It is an arithmetic number, because the mean of its divisors is an integer number (21068965).

Almost surely, 2^42137929 is an apocalyptic number.

It is an amenable number.

42137929 is a deficient number, since it is larger than the sum of its proper divisors (1).

42137929 is an equidigital number, since it uses as much as digits as its factorization.

42137929 is an evil number, because the sum of its binary digits is even.

The product of its digits is 27216, while the sum is 37.

The square root of 42137929 is about 6491.3734294061. The cubic root of 42137929 is about 347.9827605191.

The spelling of 42137929 in words is "forty-two million, one hundred thirty-seven thousand, nine hundred twenty-nine".