1397192105 has 4 divisors (see below), whose sum is σ = 1676630532. Its totient is φ = 1117753680.

The previous prime is 1397192101. The next prime is 1397192117. The reversal of 1397192105 is 5012917931.

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

It can be written as a sum of positive squares in 2 ways, for example, as 280763536 + 1116428569 = 16756^2 + 33413^2 .

It is not a de Polignac number, because 1397192105 - 2² = 1397192101 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1397192101) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 139719206 + ... + 139719215.

It is an arithmetic number, because the mean of its divisors is an integer number (419157633).

Almost surely, 2^1397192105 is an apocalyptic number.

It is an amenable number.

1397192105 is a deficient number, since it is larger than the sum of its proper divisors (279438427).

1397192105 is an equidigital number, since it uses as much as digits as its factorization.

1397192105 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 279438426.

The product of its (nonzero) digits is 17010, while the sum is 38.

The square root of 1397192105 is about 37379.0329596687. The cubic root of 1397192105 is about 1117.9405460238.

The spelling of 1397192105 in words is "one billion, three hundred ninety-seven million, one hundred ninety-two thousand, one hundred five".