127774997 has 12 divisors (see below), whose sum is σ = 151443756. Its totient is φ = 107452800.

The previous prime is 127774993. The next prime is 127775027. The reversal of 127774997 is 799477721.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 45346756 + 82428241 = 6734^2 + 9079^2 .

It is not a de Polignac number, because 127774997 - 2² = 127774993 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (53).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (127774993) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 22004 + ... + 27197.

It is an arithmetic number, because the mean of its divisors is an integer number (12620313).

Almost surely, 2^127774997 is an apocalyptic number.

It is an amenable number.

127774997 is a deficient number, since it is larger than the sum of its proper divisors (23668759).

127774997 is an equidigital number, since it uses as much as digits as its factorization.

127774997 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 49268 (or 49261 counting only the distinct ones).

The product of its digits is 1555848, while the sum is 53.

The square root of 127774997 is about 11303.7603035450. The cubic root of 127774997 is about 503.6729488270.

The spelling of 127774997 in words is "one hundred twenty-seven million, seven hundred seventy-four thousand, nine hundred ninety-seven".