40512397 has 2 divisors, whose sum is σ = 40512398. Its totient is φ = 40512396.

The previous prime is 40512371. The next prime is 40512419. The reversal of 40512397 is 79321504.

40512397 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 40182921 + 329476 = 6339^2 + 574^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-40512397 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (40512317) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20256198 + 20256199.

It is an arithmetic number, because the mean of its divisors is an integer number (20256199).

Almost surely, 2^40512397 is an apocalyptic number.

It is an amenable number.

40512397 is a deficient number, since it is larger than the sum of its proper divisors (1).

40512397 is an equidigital number, since it uses as much as digits as its factorization.

40512397 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 7560, while the sum is 31.

The square root of 40512397 is about 6364.9349564626. The cubic root of 40512397 is about 343.4493087531.

The spelling of 40512397 in words is "forty million, five hundred twelve thousand, three hundred ninety-seven".