1977409117 has 8 divisors (see below), whose sum is σ = 2000410496. Its totient is φ = 1954461312.

The previous prime is 1977409079. The next prime is 1977409129. The reversal of 1977409117 is 7119047791.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1977409117 - 2²³ = 1969020509 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1977409517) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 63388 + ... + 89290.

It is an arithmetic number, because the mean of its divisors is an integer number (250051312).

Almost surely, 2^1977409117 is an apocalyptic number.

It is an amenable number.

1977409117 is a deficient number, since it is larger than the sum of its proper divisors (23001379).

1977409117 is an equidigital number, since it uses as much as digits as its factorization.

1977409117 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26787.

The product of its (nonzero) digits is 111132, while the sum is 46.

The square root of 1977409117 is about 44468.0685098870. The cubic root of 1977409117 is about 1255.1592877294.

The spelling of 1977409117 in words is "one billion, nine hundred seventy-seven million, four hundred nine thousand, one hundred seventeen".