1007818397 has 4 divisors (see below), whose sum is σ = 1007883036. Its totient is φ = 1007753760.

The previous prime is 1007818351. The next prime is 1007818403. The reversal of 1007818397 is 7938187001.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 3308761 + 1004509636 = 1819^2 + 31694^2 .

It is a cyclic number.

It is not a de Polignac number, because 1007818397 - 2¹⁰ = 1007817373 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1007818597) 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, 7073 + ... + 45449.

It is an arithmetic number, because the mean of its divisors is an integer number (251970759).

Almost surely, 2^1007818397 is an apocalyptic number.

It is an amenable number.

1007818397 is a deficient number, since it is larger than the sum of its proper divisors (64639).

1007818397 is an equidigital number, since it uses as much as digits as its factorization.

1007818397 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 64638.

The product of its (nonzero) digits is 84672, while the sum is 44.

The square root of 1007818397 is about 31746.1556255242. The cubic root of 1007818397 is about 1002.5993697558.

The spelling of 1007818397 in words is "one billion, seven million, eight hundred eighteen thousand, three hundred ninety-seven".