1040040077 has 4 divisors (see below), whose sum is σ = 1040348220. Its totient is φ = 1039731936.

The previous prime is 1040040061. The next prime is 1040040101. The reversal of 1040040077 is 7700400401.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 7700400401 = 73 ⋅105484937.

It can be written as a sum of positive squares in 2 ways, for example, as 1022784361 + 17255716 = 31981^2 + 4154^2 .

It is a cyclic number.

It is not a de Polignac number, because 1040040077 - 2⁴ = 1040040061 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 (1040040007) 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, 148952 + ... + 155777.

It is an arithmetic number, because the mean of its divisors is an integer number (260087055).

Almost surely, 2^1040040077 is an apocalyptic number.

It is an amenable number.

1040040077 is a deficient number, since it is larger than the sum of its proper divisors (308143).

1040040077 is an equidigital number, since it uses as much as digits as its factorization.

1040040077 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 308142.

The product of its (nonzero) digits is 784, while the sum is 23.

The square root of 1040040077 is about 32249.6523547154. The cubic root of 1040040077 is about 1013.1724178804.

Adding to 1040040077 its reverse (7700400401), we get a palindrome (8740440478).

The spelling of 1040040077 in words is "one billion, forty million, forty thousand, seventy-seven".