127551197 has 2 divisors, whose sum is σ = 127551198. Its totient is φ = 127551196.

The previous prime is 127551167. The next prime is 127551211. The reversal of 127551197 is 791155721.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 127486681 + 64516 = 11291^2 + 254^2 .

It is a cyclic number.

It is not a de Polignac number, because 127551197 - 2¹⁸ = 127289053 is a prime.

It is a super-2 number, since 2×127551197² = 32538615712265618, which contains 22 as substring.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 127551197.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (127551107) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 63775598 + 63775599.

It is an arithmetic number, because the mean of its divisors is an integer number (63775599).

Almost surely, 2^127551197 is an apocalyptic number.

It is an amenable number.

127551197 is a deficient number, since it is larger than the sum of its proper divisors (1).

127551197 is an equidigital number, since it uses as much as digits as its factorization.

127551197 is an evil number, because the sum of its binary digits is even.

The product of its digits is 22050, while the sum is 38.

The square root of 127551197 is about 11293.8566043668. The cubic root of 127551197 is about 503.3787131675.

The spelling of 127551197 in words is "one hundred twenty-seven million, five hundred fifty-one thousand, one hundred ninety-seven".