127929491401 has 4 divisors (see below), whose sum is σ = 128136833172. Its totient is φ = 127722149632.

The previous prime is 127929491369. The next prime is 127929491447. The reversal of 127929491401 is 104194929721.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 67016783376 + 60912708025 = 258876^2 + 246805^2 .

It is a cyclic number.

It is not a de Polignac number, because 127929491401 - 2⁵ = 127929491369 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (127929491461) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 103669960 + ... + 103671193.

It is an arithmetic number, because the mean of its divisors is an integer number (32034208293).

Almost surely, 2^127929491401 is an apocalyptic number.

It is an amenable number.

127929491401 is a deficient number, since it is larger than the sum of its proper divisors (207341771).

127929491401 is an equidigital number, since it uses as much as digits as its factorization.

127929491401 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 207341770.

The product of its (nonzero) digits is 326592, while the sum is 49.

The spelling of 127929491401 in words is "one hundred twenty-seven billion, nine hundred twenty-nine million, four hundred ninety-one thousand, four hundred one".