45531397 has 2 divisors, whose sum is σ = 45531398. Its totient is φ = 45531396.

The previous prime is 45531379. The next prime is 45531403. The reversal of 45531397 is 79313554.

Together with previous prime (45531379) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 34975396 + 10556001 = 5914^2 + 3249^2 .

It is a cyclic number.

It is not a de Polignac number, because 45531397 - 2²³ = 37142789 is a prime.

It is a super-2 number, since 2×45531397² = 4146216225543218, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (45531307) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 22765698 + 22765699.

It is an arithmetic number, because the mean of its divisors is an integer number (22765699).

Almost surely, 2^45531397 is an apocalyptic number.

It is an amenable number.

45531397 is a deficient number, since it is larger than the sum of its proper divisors (1).

45531397 is an equidigital number, since it uses as much as digits as its factorization.

45531397 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 56700, while the sum is 37.

The square root of 45531397 is about 6747.6956807491. The cubic root of 45531397 is about 357.0839458716.

The spelling of 45531397 in words is "forty-five million, five hundred thirty-one thousand, three hundred ninety-seven".