1397084746 has 4 divisors (see below), whose sum is σ = 2095627122. Its totient is φ = 698542372.

The previous prime is 1397084723. The next prime is 1397084747. The reversal of 1397084746 is 6474807931.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 6474807931 = 29 ⋅223269239.

It can be written as a sum of positive squares in only one way, i.e., 1366115521 + 30969225 = 36961^2 + 5565^2 .

It is a Smith number, since the sum of its digits (49) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a self number, because there is not a number n which added to its sum of digits gives 1397084746.

It is not an unprimeable number, because it can be changed into a prime (1397084747) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 349271185 + ... + 349271188.

Almost surely, 2^1397084746 is an apocalyptic number.

1397084746 is a deficient number, since it is larger than the sum of its proper divisors (698542376).

1397084746 is an equidigital number, since it uses as much as digits as its factorization.

1397084746 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 698542375.

The product of its (nonzero) digits is 1016064, while the sum is 49.

The square root of 1397084746 is about 37377.5968462393. The cubic root of 1397084746 is about 1117.9119114375.

The spelling of 1397084746 in words is "one billion, three hundred ninety-seven million, eighty-four thousand, seven hundred forty-six".