1397800297 has 8 divisors (see below), whose sum is σ = 1421540000. Its totient is φ = 1374145344.

The previous prime is 1397800291. The next prime is 1397800337. The reversal of 1397800297 is 7920087931.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1397800297 - 2³ = 1397800289 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1397800291) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12529 + ... + 54337.

It is an arithmetic number, because the mean of its divisors is an integer number (177692500).

Almost surely, 2^1397800297 is an apocalyptic number.

It is an amenable number.

1397800297 is a deficient number, since it is larger than the sum of its proper divisors (23739703).

1397800297 is an equidigital number, since it uses as much as digits as its factorization.

1397800297 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42375.

The product of its (nonzero) digits is 190512, while the sum is 46.

The square root of 1397800297 is about 37387.1675444931. The cubic root of 1397800297 is about 1118.1027341395.

The spelling of 1397800297 in words is "one billion, three hundred ninety-seven million, eight hundred thousand, two hundred ninety-seven".