127621573 has 2 divisors, whose sum is σ = 127621574. Its totient is φ = 127621572.

The previous prime is 127621553. The next prime is 127621589. The reversal of 127621573 is 375126721.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 94926049 + 32695524 = 9743^2 + 5718^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-127621573 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (127621553) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 63810786 + 63810787.

It is an arithmetic number, because the mean of its divisors is an integer number (63810787).

Almost surely, 2^127621573 is an apocalyptic number.

It is an amenable number.

127621573 is a deficient number, since it is larger than the sum of its proper divisors (1).

127621573 is an equidigital number, since it uses as much as digits as its factorization.

127621573 is an evil number, because the sum of its binary digits is even.

The product of its digits is 17640, while the sum is 34.

The square root of 127621573 is about 11296.9718508988. The cubic root of 127621573 is about 503.4712753903.

The spelling of 127621573 in words is "one hundred twenty-seven million, six hundred twenty-one thousand, five hundred seventy-three".