1944794437 has 2 divisors, whose sum is σ = 1944794438. Its totient is φ = 1944794436.

The previous prime is 1944794431. The next prime is 1944794477. The reversal of 1944794437 is 7344974491.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1514065921 + 430728516 = 38911^2 + 20754^2 .

It is a cyclic number.

It is not a de Polignac number, because 1944794437 - 2⁷ = 1944794309 is a prime.

It is a super-2 number, since 2×1944794437² = 7564450804372293938, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1944794431) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 972397218 + 972397219.

It is an arithmetic number, because the mean of its divisors is an integer number (972397219).

Almost surely, 2^1944794437 is an apocalyptic number.

It is an amenable number.

1944794437 is a deficient number, since it is larger than the sum of its proper divisors (1).

1944794437 is an equidigital number, since it uses as much as digits as its factorization.

1944794437 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3048192, while the sum is 52.

The square root of 1944794437 is about 44099.8235483998. The cubic root of 1944794437 is about 1248.2202805081.

It can be divided in two parts, 194479 and 4437, that added together give a square (198916 = 446²).

The spelling of 1944794437 in words is "one billion, nine hundred forty-four million, seven hundred ninety-four thousand, four hundred thirty-seven".