1397167819 has 4 divisors (see below), whose sum is σ = 1397424096. Its totient is φ = 1396911544.

The previous prime is 1397167789. The next prime is 1397167847. The reversal of 1397167819 is 9187617931.

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 1397167819 - 2²⁹ = 860296907 is a prime.

It is a super-2 number, since 2×1397167819² = 3904155828898433522, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1397167879) 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, 119779 + ... + 130924.

It is an arithmetic number, because the mean of its divisors is an integer number (349356024).

Almost surely, 2^1397167819 is an apocalyptic number.

1397167819 is a deficient number, since it is larger than the sum of its proper divisors (256277).

1397167819 is an equidigital number, since it uses as much as digits as its factorization.

1397167819 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 256276.

The product of its digits is 571536, while the sum is 52.

The square root of 1397167819 is about 37378.7080969902. The cubic root of 1397167819 is about 1117.9340686369.

The spelling of 1397167819 in words is "one billion, three hundred ninety-seven million, one hundred sixty-seven thousand, eight hundred nineteen".