1944589957 has 2 divisors, whose sum is σ = 1944589958. Its totient is φ = 1944589956.

The previous prime is 1944589879. The next prime is 1944589967. The reversal of 1944589957 is 7599854491.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1624573636 + 320016321 = 40306^2 + 17889^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1944589957 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1944589895 and 1944589904.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1944589967) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 972294978 + 972294979.

It is an arithmetic number, because the mean of its divisors is an integer number (972294979).

Almost surely, 2^1944589957 is an apocalyptic number.

It is an amenable number.

1944589957 is a deficient number, since it is larger than the sum of its proper divisors (1).

1944589957 is an equidigital number, since it uses as much as digits as its factorization.

1944589957 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 16329600, while the sum is 61.

The square root of 1944589957 is about 44097.5051108337. The cubic root of 1944589957 is about 1248.1765320920.

The spelling of 1944589957 in words is "one billion, nine hundred forty-four million, five hundred eighty-nine thousand, nine hundred fifty-seven".