1397429073 has 12 divisors (see below), whose sum is σ = 2023449220. Its totient is φ = 929339136.

The previous prime is 1397429071. The next prime is 1397429123. The reversal of 1397429073 is 3709247931.

It can be written as a sum of positive squares in 2 ways, for example, as 532363329 + 865065744 = 23073^2 + 29412^2 .

It is not a de Polignac number, because 1397429073 - 2¹ = 1397429071 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1397429071) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 186136 + ... + 193497.

Almost surely, 2^1397429073 is an apocalyptic number.

It is an amenable number.

1397429073 is a deficient number, since it is larger than the sum of its proper divisors (626020147).

1397429073 is a wasteful number, since it uses less digits than its factorization.

1397429073 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 380048 (or 380045 counting only the distinct ones).

The product of its (nonzero) digits is 285768, while the sum is 45.

The square root of 1397429073 is about 37382.2026237085. The cubic root of 1397429073 is about 1118.0037444818.

The spelling of 1397429073 in words is "one billion, three hundred ninety-seven million, four hundred twenty-nine thousand, seventy-three".