1396697671 has 2 divisors, whose sum is σ = 1396697672. Its totient is φ = 1396697670.

The previous prime is 1396697633. The next prime is 1396697699. The reversal of 1396697671 is 1767966931.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1396697671 - 2¹³ = 1396689479 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1396697171) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 698348835 + 698348836.

It is an arithmetic number, because the mean of its divisors is an integer number (698348836).

Almost surely, 2^1396697671 is an apocalyptic number.

1396697671 is a deficient number, since it is larger than the sum of its proper divisors (1).

1396697671 is an equidigital number, since it uses as much as digits as its factorization.

1396697671 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2571912, while the sum is 55.

The square root of 1396697671 is about 37372.4185864388. The cubic root of 1396697671 is about 1117.8086593566.

The spelling of 1396697671 in words is "one billion, three hundred ninety-six million, six hundred ninety-seven thousand, six hundred seventy-one".