1383961275 has 48 divisors (see below), whose sum is σ = 2549226720. Its totient is φ = 736128000.

The previous prime is 1383961247. The next prime is 1383961277. The reversal of 1383961275 is 5721693831.

1383961275 is a `hidden beast` number, since 138 + 396 + 127 + 5 = 666.

It is not a de Polignac number, because 1383961275 - 2⁷ = 1383961147 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 1383961275.

It is not an unprimeable number, because it can be changed into a prime (1383961277) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 268119 + ... + 273231.

It is an arithmetic number, because the mean of its divisors is an integer number (53108890).

Almost surely, 2^1383961275 is an apocalyptic number.

1383961275 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

1383961275 is a deficient number, since it is larger than the sum of its proper divisors (1165265445).

1383961275 is a wasteful number, since it uses less digits than its factorization.

1383961275 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5533 (or 5522 counting only the distinct ones).

The product of its digits is 272160, while the sum is 45.

The square root of 1383961275 is about 37201.6300046114. The cubic root of 1383961275 is about 1114.4005370898.

The spelling of 1383961275 in words is "one billion, three hundred eighty-three million, nine hundred sixty-one thousand, two hundred seventy-five".