42731077 has 4 divisors (see below), whose sum is σ = 42744556. Its totient is φ = 42717600.

The previous prime is 42731011. The next prime is 42731083. The reversal of 42731077 is 77013724.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 1758276 + 40972801 = 1326^2 + 6401^2 .

It is a cyclic number.

It is not a de Polignac number, because 42731077 - 2¹⁵ = 42698309 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42731177) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 913 + ... + 9289.

It is an arithmetic number, because the mean of its divisors is an integer number (10686139).

Almost surely, 2^42731077 is an apocalyptic number.

It is an amenable number.

42731077 is a deficient number, since it is larger than the sum of its proper divisors (13479).

42731077 is an equidigital number, since it uses as much as digits as its factorization.

42731077 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13478.

The product of its (nonzero) digits is 8232, while the sum is 31.

The square root of 42731077 is about 6536.9011771634. The cubic root of 42731077 is about 349.6079337647.

The spelling of 42731077 in words is "forty-two million, seven hundred thirty-one thousand, seventy-seven".