127803961 has 2 divisors, whose sum is σ = 127803962. Its totient is φ = 127803960.

The previous prime is 127803887. The next prime is 127803983. The reversal of 127803961 is 169308721.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 75690000 + 52113961 = 8700^2 + 7219^2 .

It is a cyclic number.

It is not a de Polignac number, because 127803961 - 2⁹ = 127803449 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 127803961.

It is not a weakly prime, because it can be changed into another prime (127803461) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 63901980 + 63901981.

It is an arithmetic number, because the mean of its divisors is an integer number (63901981).

Almost surely, 2^127803961 is an apocalyptic number.

It is an amenable number.

127803961 is a deficient number, since it is larger than the sum of its proper divisors (1).

127803961 is an equidigital number, since it uses as much as digits as its factorization.

127803961 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 18144, while the sum is 37.

The square root of 127803961 is about 11305.0413975359. The cubic root of 127803961 is about 503.7110034320.

The spelling of 127803961 in words is "one hundred twenty-seven million, eight hundred three thousand, nine hundred sixty-one".