1009430397 has 16 divisors (see below), whose sum is σ = 1501992000. Its totient is φ = 670010832.

The previous prime is 1009430393. The next prime is 1009430413. The reversal of 1009430397 is 7930349001.

It is not a de Polignac number, because 1009430397 - 2² = 1009430393 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1009430393) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 75447 + ... + 87812.

It is an arithmetic number, because the mean of its divisors is an integer number (93874500).

Almost surely, 2^1009430397 is an apocalyptic number.

It is an amenable number.

1009430397 is a deficient number, since it is larger than the sum of its proper divisors (492561603).

1009430397 is a wasteful number, since it uses less digits than its factorization.

1009430397 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 163497 (or 163491 counting only the distinct ones).

The product of its (nonzero) digits is 20412, while the sum is 36.

The square root of 1009430397 is about 31771.5343822108. The cubic root of 1009430397 is about 1003.1336357366.

Adding to 1009430397 its reverse (7930349001), we get a palindrome (8939779398).

The spelling of 1009430397 in words is "one billion, nine million, four hundred thirty thousand, three hundred ninety-seven".