1954425749 has 2 divisors, whose sum is σ = 1954425750. Its totient is φ = 1954425748.

The previous prime is 1954425731. The next prime is 1954425751. The reversal of 1954425749 is 9475244591.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1622639524 + 331786225 = 40282^2 + 18215^2 .

It is an emirp because it is prime and its reverse (9475244591) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1954425749 is a prime.

It is a super-2 number, since 2×1954425749² = 7639560016708422002, which contains 22 as substring.

Together with 1954425751, it forms a pair of twin primes.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 1954425697 and 1954425706.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1954425719) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 977212874 + 977212875.

It is an arithmetic number, because the mean of its divisors is an integer number (977212875).

Almost surely, 2^1954425749 is an apocalyptic number.

It is an amenable number.

1954425749 is a deficient number, since it is larger than the sum of its proper divisors (1).

1954425749 is an equidigital number, since it uses as much as digits as its factorization.

1954425749 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1814400, while the sum is 50.

The square root of 1954425749 is about 44208.8876697888. The cubic root of 1954425749 is about 1250.2774315408.

The spelling of 1954425749 in words is "one billion, nine hundred fifty-four million, four hundred twenty-five thousand, seven hundred forty-nine".