42203900777 has 2 divisors, whose sum is σ = 42203900778. Its totient is φ = 42203900776.

The previous prime is 42203900741. The next prime is 42203900797. The reversal of 42203900777 is 77700930224.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 41862796816 + 341103961 = 204604^2 + 18469^2 .

It is a cyclic number.

It is not a de Polignac number, because 42203900777 - 2¹² = 42203896681 is a prime.

It is a super-2 number, since 2×42203900777² (a number of 22 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (42203900707) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21101950388 + 21101950389.

It is an arithmetic number, because the mean of its divisors is an integer number (21101950389).

Almost surely, 2^42203900777 is an apocalyptic number.

It is an amenable number.

42203900777 is a deficient number, since it is larger than the sum of its proper divisors (1).

42203900777 is an equidigital number, since it uses as much as digits as its factorization.

42203900777 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 148176, while the sum is 41.

The spelling of 42203900777 in words is "forty-two billion, two hundred three million, nine hundred thousand, seven hundred seventy-seven".