40945397 has 2 divisors, whose sum is σ = 40945398. Its totient is φ = 40945396.

The previous prime is 40945393. The next prime is 40945409. The reversal of 40945397 is 79354904.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 27447121 + 13498276 = 5239^2 + 3674^2 .

It is a cyclic number.

It is not a de Polignac number, because 40945397 - 2² = 40945393 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (40945393) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20472698 + 20472699.

It is an arithmetic number, because the mean of its divisors is an integer number (20472699).

Almost surely, 2^40945397 is an apocalyptic number.

It is an amenable number.

40945397 is a deficient number, since it is larger than the sum of its proper divisors (1).

40945397 is an equidigital number, since it uses as much as digits as its factorization.

40945397 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 136080, while the sum is 41.

The square root of 40945397 is about 6398.8590389225. The cubic root of 40945397 is about 344.6685804190.

The spelling of 40945397 in words is "forty million, nine hundred forty-five thousand, three hundred ninety-seven".