1375926691 has 4 divisors (see below), whose sum is σ = 1376652384. Its totient is φ = 1375201000.

The previous prime is 1375926689. The next prime is 1375926707. The reversal of 1375926691 is 1966295731.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1375926691 - 2¹ = 1375926689 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1375926641) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 359995 + ... + 363796.

It is an arithmetic number, because the mean of its divisors is an integer number (344163096).

Almost surely, 2^1375926691 is an apocalyptic number.

1375926691 is a deficient number, since it is larger than the sum of its proper divisors (725693).

1375926691 is an equidigital number, since it uses as much as digits as its factorization.

1375926691 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 725692.

The product of its digits is 612360, while the sum is 49.

The square root of 1375926691 is about 37093.4858297249. The cubic root of 1375926691 is about 1112.2398003770.

The spelling of 1375926691 in words is "one billion, three hundred seventy-five million, nine hundred twenty-six thousand, six hundred ninety-one".