42577739 has 2 divisors, whose sum is σ = 42577740. Its totient is φ = 42577738.

The previous prime is 42577729. The next prime is 42577747. The reversal of 42577739 is 93777524.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-42577739 is a prime.

It is a Sophie Germain prime.

It is a self number, because there is not a number n which added to its sum of digits gives 42577739.

It is not a weakly prime, because it can be changed into another prime (42577729) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21288869 + 21288870.

It is an arithmetic number, because the mean of its divisors is an integer number (21288870).

Almost surely, 2^42577739 is an apocalyptic number.

42577739 is a deficient number, since it is larger than the sum of its proper divisors (1).

42577739 is an equidigital number, since it uses as much as digits as its factorization.

42577739 is an evil number, because the sum of its binary digits is even.

The product of its digits is 370440, while the sum is 44.

The square root of 42577739 is about 6525.1619903264. The cubic root of 42577739 is about 349.1892499360.

It can be divided in two parts, 4257 and 7739, that multiplied together give a palindrome (32944923).

The spelling of 42577739 in words is "forty-two million, five hundred seventy-seven thousand, seven hundred thirty-nine".