127720403 has 16 divisors (see below), whose sum is σ = 138289152. Its totient is φ = 117612000.

The previous prime is 127720381. The next prime is 127720421. The reversal of 127720403 is 304027721.

It is a cyclic number.

It is not a de Polignac number, because 127720403 - 2¹² = 127716307 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (127722403) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 192893 + ... + 193553.

It is an arithmetic number, because the mean of its divisors is an integer number (8643072).

Almost surely, 2^127720403 is an apocalyptic number.

127720403 is a deficient number, since it is larger than the sum of its proper divisors (10568749).

127720403 is a wasteful number, since it uses less digits than its factorization.

127720403 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 986.

The product of its (nonzero) digits is 2352, while the sum is 26.

The square root of 127720403 is about 11301.3451854193. The cubic root of 127720403 is about 503.6012043835.

The spelling of 127720403 in words is "one hundred twenty-seven million, seven hundred twenty thousand, four hundred three".