2354887781 has 2 divisors, whose sum is σ = 2354887782. Its totient is φ = 2354887780.

The previous prime is 2354887699. The next prime is 2354887817. The reversal of 2354887781 is 1877884532.

2354887781 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

Together with next prime (2354887817) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1416016900 + 938870881 = 37630^2 + 30641^2 .

It is a cyclic number.

It is not a de Polignac number, because 2354887781 - 2¹⁴ = 2354871397 is a prime.

It is a super-2 number, since 2×2354887781² = 11090992922206207922, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2354887181) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1177443890 + 1177443891.

It is an arithmetic number, because the mean of its divisors is an integer number (1177443891).

Almost surely, 2^2354887781 is an apocalyptic number.

It is an amenable number.

2354887781 is a deficient number, since it is larger than the sum of its proper divisors (1).

2354887781 is an equidigital number, since it uses as much as digits as its factorization.

2354887781 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3010560, while the sum is 53.

The square root of 2354887781 is about 48527.1859991902. The cubic root of 2354887781 is about 1330.4240042970.

The spelling of 2354887781 in words is "two billion, three hundred fifty-four million, eight hundred eighty-seven thousand, seven hundred eighty-one".