1040139977 has 2 divisors, whose sum is σ = 1040139978. Its totient is φ = 1040139976.

The previous prime is 1040139949. The next prime is 1040139979. The reversal of 1040139977 is 7799310401.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 546811456 + 493328521 = 23384^2 + 22211^2 .

It is a cyclic number.

It is not a de Polignac number, because 1040139977 - 2⁶ = 1040139913 is a prime.

Together with 1040139979, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (1040139979) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 520069988 + 520069989.

It is an arithmetic number, because the mean of its divisors is an integer number (520069989).

Almost surely, 2^1040139977 is an apocalyptic number.

It is an amenable number.

1040139977 is a deficient number, since it is larger than the sum of its proper divisors (1).

1040139977 is an equidigital number, since it uses as much as digits as its factorization.

1040139977 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 47628, while the sum is 41.

The square root of 1040139977 is about 32251.2011714293. The cubic root of 1040139977 is about 1013.2048565932.

The spelling of 1040139977 in words is "one billion, forty million, one hundred thirty-nine thousand, nine hundred seventy-seven".