40420697 has 2 divisors, whose sum is σ = 40420698. Its totient is φ = 40420696.

The previous prime is 40420691. The next prime is 40420717. The reversal of 40420697 is 79602404.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 35772361 + 4648336 = 5981^2 + 2156^2 .

It is a cyclic number.

It is not a de Polignac number, because 40420697 - 2²⁰ = 39372121 is a prime.

It is a Chen prime.

It is equal to p_2457716 and since 40420697 and 2457716 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (40420691) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20210348 + 20210349.

It is an arithmetic number, because the mean of its divisors is an integer number (20210349).

Almost surely, 2^40420697 is an apocalyptic number.

It is an amenable number.

40420697 is a deficient number, since it is larger than the sum of its proper divisors (1).

40420697 is an equidigital number, since it uses as much as digits as its factorization.

40420697 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 12096, while the sum is 32.

The square root of 40420697 is about 6357.7273455221. The cubic root of 40420697 is about 343.1899799519.

The spelling of 40420697 in words is "forty million, four hundred twenty thousand, six hundred ninety-seven".