1385611977 has 8 divisors (see below), whose sum is σ = 1927808064. Its totient is φ = 883578608.

The previous prime is 1385611973. The next prime is 1385612003. The reversal of 1385611977 is 7791165831.

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 1385611977 - 2² = 1385611973 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1385611973) 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, 10040598 + ... + 10040735.

It is an arithmetic number, because the mean of its divisors is an integer number (240976008).

Almost surely, 2^1385611977 is an apocalyptic number.

It is an amenable number.

1385611977 is a deficient number, since it is larger than the sum of its proper divisors (542196087).

1385611977 is a wasteful number, since it uses less digits than its factorization.

1385611977 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20081359.

The product of its digits is 317520, while the sum is 48.

The square root of 1385611977 is about 37223.8092757848. The cubic root of 1385611977 is about 1114.8434233538.

The spelling of 1385611977 in words is "one billion, three hundred eighty-five million, six hundred eleven thousand, nine hundred seventy-seven".