40145477 has 2 divisors, whose sum is σ = 40145478. Its totient is φ = 40145476.

The previous prime is 40145447. The next prime is 40145489. The reversal of 40145477 is 77454104.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 40119556 + 25921 = 6334^2 + 161^2 .

It is a cyclic number.

It is not a de Polignac number, because 40145477 - 2¹⁴ = 40129093 is a prime.

It is a super-2 number, since 2×40145477² = 3223318647115058, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (40145447) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20072738 + 20072739.

It is an arithmetic number, because the mean of its divisors is an integer number (20072739).

Almost surely, 2^40145477 is an apocalyptic number.

It is an amenable number.

40145477 is a deficient number, since it is larger than the sum of its proper divisors (1).

40145477 is an equidigital number, since it uses as much as digits as its factorization.

40145477 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 15680, while the sum is 32.

The square root of 40145477 is about 6336.0458489503. The cubic root of 40145477 is about 342.4092913390.

The spelling of 40145477 in words is "forty million, one hundred forty-five thousand, four hundred seventy-seven".