40432661 has 2 divisors, whose sum is σ = 40432662. Its totient is φ = 40432660.

The previous prime is 40432657. The next prime is 40432669. The reversal of 40432661 is 16623404.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 38514436 + 1918225 = 6206^2 + 1385^2 .

It is a cyclic number.

It is not a de Polignac number, because 40432661 - 2² = 40432657 is a prime.

It is a Chen prime.

It is equal to p_2458403 and since 40432661 and 2458403 have the same sum of digits, it is a Honaker prime.

It is a self number, because there is not a number n which added to its sum of digits gives 40432661.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (40432669) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20216330 + 20216331.

It is an arithmetic number, because the mean of its divisors is an integer number (20216331).

Almost surely, 2^40432661 is an apocalyptic number.

It is an amenable number.

40432661 is a deficient number, since it is larger than the sum of its proper divisors (1).

40432661 is an equidigital number, since it uses as much as digits as its factorization.

40432661 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3456, while the sum is 26.

The square root of 40432661 is about 6358.6681781644. The cubic root of 40432661 is about 343.2238365336.

The spelling of 40432661 in words is "forty million, four hundred thirty-two thousand, six hundred sixty-one".