1944097997 has 2 divisors, whose sum is σ = 1944097998. Its totient is φ = 1944097996.

The previous prime is 1944097957. The next prime is 1944098003. The reversal of 1944097997 is 7997904491.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1546534276 + 397563721 = 39326^2 + 19939^2 .

It is a cyclic number.

It is not a de Polignac number, because 1944097997 - 2⁸ = 1944097741 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1944097927) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 972048998 + 972048999.

It is an arithmetic number, because the mean of its divisors is an integer number (972048999).

Almost surely, 2^1944097997 is an apocalyptic number.

It is an amenable number.

1944097997 is a deficient number, since it is larger than the sum of its proper divisors (1).

1944097997 is an equidigital number, since it uses as much as digits as its factorization.

1944097997 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5143824, while the sum is 59.

The square root of 1944097997 is about 44091.9266646401. The cubic root of 1944097997 is about 1248.0712648753.

The spelling of 1944097997 in words is "one billion, nine hundred forty-four million, ninety-seven thousand, nine hundred ninety-seven".