1375776921 has 8 divisors (see below), whose sum is σ = 1850603040. Its totient is φ = 909067712.

The previous prime is 1375776889. The next prime is 1375776973. The reversal of 1375776921 is 1296775731.

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 1375776921 - 2⁵ = 1375776889 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1375776421) 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, 2028831 + ... + 2029508.

It is an arithmetic number, because the mean of its divisors is an integer number (231325380).

Almost surely, 2^1375776921 is an apocalyptic number.

It is an amenable number.

1375776921 is a deficient number, since it is larger than the sum of its proper divisors (474826119).

1375776921 is a wasteful number, since it uses less digits than its factorization.

1375776921 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4058455.

The product of its digits is 555660, while the sum is 48.

The square root of 1375776921 is about 37091.4669567004. The cubic root of 1375776921 is about 1112.1994430429.

The spelling of 1375776921 in words is "one billion, three hundred seventy-five million, seven hundred seventy-six thousand, nine hundred twenty-one".