121944397 has 2 divisors, whose sum is σ = 121944398. Its totient is φ = 121944396.

The previous prime is 121944331. The next prime is 121944401. The reversal of 121944397 is 793449121.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 102637161 + 19307236 = 10131^2 + 4394^2 .

It is an emirp because it is prime and its reverse (793449121) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 121944397 - 2¹⁹ = 121420109 is a prime.

It is a super-4 number, since 4×121944397⁴ (a number of 33 digits) contains 4444 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (121941397) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60972198 + 60972199.

It is an arithmetic number, because the mean of its divisors is an integer number (60972199).

Almost surely, 2^121944397 is an apocalyptic number.

It is an amenable number.

121944397 is a deficient number, since it is larger than the sum of its proper divisors (1).

121944397 is an equidigital number, since it uses as much as digits as its factorization.

121944397 is an evil number, because the sum of its binary digits is even.

The product of its digits is 54432, while the sum is 40.

The square root of 121944397 is about 11042.8437007865. The cubic root of 121944397 is about 495.8922071623.

The spelling of 121944397 in words is "one hundred twenty-one million, nine hundred forty-four thousand, three hundred ninety-seven".