1977005065 has 8 divisors (see below), whose sum is σ = 2711321280. Its totient is φ = 1355660592.

The previous prime is 1977005057. The next prime is 1977005071. The reversal of 1977005065 is 5605007791.

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 1977005065 - 2³ = 1977005057 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 28242895 + ... + 28242964.

It is an arithmetic number, because the mean of its divisors is an integer number (338915160).

Almost surely, 2^1977005065 is an apocalyptic number.

It is an amenable number.

1977005065 is a deficient number, since it is larger than the sum of its proper divisors (734316215).

1977005065 is an equidigital number, since it uses as much as digits as its factorization.

1977005065 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 56485871.

The product of its (nonzero) digits is 66150, while the sum is 40.

The square root of 1977005065 is about 44463.5251076655. The cubic root of 1977005065 is about 1255.0737913152.

The spelling of 1977005065 in words is "one billion, nine hundred seventy-seven million, five thousand, sixty-five".