1397964673 has 16 divisors (see below), whose sum is σ = 1663354240. Its totient is φ = 1149883776.

The previous prime is 1397964671. The next prime is 1397964677. The reversal of 1397964673 is 3764697931.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 1397964673 - 2¹ = 1397964671 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1397964671) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 18063 + ... + 55876.

It is an arithmetic number, because the mean of its divisors is an integer number (103959640).

Almost surely, 2^1397964673 is an apocalyptic number.

It is an amenable number.

1397964673 is a deficient number, since it is larger than the sum of its proper divisors (265389567).

1397964673 is an equidigital number, since it uses as much as digits as its factorization.

1397964673 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 74056.

The product of its digits is 5143824, while the sum is 55.

The square root of 1397964673 is about 37389.3657742412. The cubic root of 1397964673 is about 1118.1465606317.

The spelling of 1397964673 in words is "one billion, three hundred ninety-seven million, nine hundred sixty-four thousand, six hundred seventy-three".