40912397 has 2 divisors, whose sum is σ = 40912398. Its totient is φ = 40912396.

The previous prime is 40912381. The next prime is 40912433. The reversal of 40912397 is 79321904.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 20967241 + 19945156 = 4579^2 + 4466^2 .

It is a cyclic number.

It is not a de Polignac number, because 40912397 - 2⁴ = 40912381 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (40912327) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20456198 + 20456199.

It is an arithmetic number, because the mean of its divisors is an integer number (20456199).

Almost surely, 2^40912397 is an apocalyptic number.

It is an amenable number.

40912397 is a deficient number, since it is larger than the sum of its proper divisors (1).

40912397 is an equidigital number, since it uses as much as digits as its factorization.

40912397 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 13608, while the sum is 35.

The square root of 40912397 is about 6396.2799344619. The cubic root of 40912397 is about 344.5759601572.

The spelling of 40912397 in words is "forty million, nine hundred twelve thousand, three hundred ninety-seven".