1395823769 has 2 divisors, whose sum is σ = 1395823770.
Its totient is φ = 1395823768.
The previous prime is 1395823727. The next prime is 1395823831. The reversal of 1395823769 is 9673285931.
It is a weak prime.
It can be written as a sum of positive squares in only one way, i.e., 1114758544 + 281065225 = 33388^2 + 16765^2
It is a cyclic number.
It is not a de Polignac number, because 1395823769 - 224 = 1379046553 is a prime.
It is a super-2 number, since 2×13958237692 = 3896647988210730722, which contains 22 as substring.
It is a self number, because there is not a number n which added to its sum of digits gives 1395823769.
It is not a weakly prime, because it can be changed into another prime (1395823469) by changing a digit.
It is a polite number, since it can be written as a sum of consecutive naturals, namely, 697911884 + 697911885.
It is an arithmetic number, because the mean of its divisors is an integer number (697911885).
Almost surely, 21395823769 is an apocalyptic number.
It is an amenable number.
1395823769 is a deficient number, since it is larger than the sum of its proper divisors (1).
1395823769 is an equidigital number, since it uses as much as digits as its factorization.
1395823769 is an evil number, because the sum of its binary digits is even.
The product of its digits is 2449440, while the sum is 53.
The square root of 1395823769 is about 37360.7249528164.
The cubic root of 1395823769 is about 1117.5754762202.
The spelling of 1395823769 in words is "one billion, three hundred ninety-five million, eight hundred twenty-three thousand, seven hundred sixty-nine".