1397450073 has 4 divisors (see below), whose sum is σ = 1863266768. Its totient is φ = 931633380.

The previous prime is 1397450051. The next prime is 1397450081. The reversal of 1397450073 is 3700547931.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 3700547931 = 3 ⋅1233515977.

It is not a de Polignac number, because 1397450073 - 2¹⁰ = 1397449049 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1397410073) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 232908343 + ... + 232908348.

It is an arithmetic number, because the mean of its divisors is an integer number (465816692).

Almost surely, 2^1397450073 is an apocalyptic number.

It is an amenable number.

1397450073 is a deficient number, since it is larger than the sum of its proper divisors (465816695).

1397450073 is an equidigital number, since it uses as much as digits as its factorization.

1397450073 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 465816694.

The product of its (nonzero) digits is 79380, while the sum is 39.

The square root of 1397450073 is about 37382.4835049786. The cubic root of 1397450073 is about 1118.0093447567.

The spelling of 1397450073 in words is "one billion, three hundred ninety-seven million, four hundred fifty thousand, seventy-three".