45840397 has 2 divisors, whose sum is σ = 45840398. Its totient is φ = 45840396.

The previous prime is 45840391. The next prime is 45840401. The reversal of 45840397 is 79304854.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 22982436 + 22857961 = 4794^2 + 4781^2 .

It is a cyclic number.

It is not a de Polignac number, because 45840397 - 2¹¹ = 45838349 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (45840391) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 22920198 + 22920199.

It is an arithmetic number, because the mean of its divisors is an integer number (22920199).

Almost surely, 2^45840397 is an apocalyptic number.

It is an amenable number.

45840397 is a deficient number, since it is larger than the sum of its proper divisors (1).

45840397 is an equidigital number, since it uses as much as digits as its factorization.

45840397 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 120960, while the sum is 40.

The square root of 45840397 is about 6770.5536701218. The cubic root of 45840397 is about 357.8899118450.

The spelling of 45840397 in words is "forty-five million, eight hundred forty thousand, three hundred ninety-seven".