1954157743 has 2 divisors, whose sum is σ = 1954157744. Its totient is φ = 1954157742.

The previous prime is 1954157741. The next prime is 1954157749. The reversal of 1954157743 is 3477514591.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1954157743 - 2¹ = 1954157741 is a prime.

Together with 1954157741, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 1954157693 and 1954157702.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1954157741) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 977078871 + 977078872.

It is an arithmetic number, because the mean of its divisors is an integer number (977078872).

Almost surely, 2^1954157743 is an apocalyptic number.

1954157743 is a deficient number, since it is larger than the sum of its proper divisors (1).

1954157743 is an equidigital number, since it uses as much as digits as its factorization.

1954157743 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 529200, while the sum is 46.

The square root of 1954157743 is about 44205.8564332827. The cubic root of 1954157743 is about 1250.2202796859.

It can be divided in two parts, 19541 and 57743, that added together give a square (77284 = 278²).

The spelling of 1954157743 in words is "one billion, nine hundred fifty-four million, one hundred fifty-seven thousand, seven hundred forty-three".