40263649 has 2 divisors, whose sum is σ = 40263650. Its totient is φ = 40263648.

The previous prime is 40263611. The next prime is 40263677. The reversal of 40263649 is 94636204.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 40259025 + 4624 = 6345^2 + 68^2 .

It is a cyclic number.

It is not a de Polignac number, because 40263649 - 2⁷ = 40263521 is a prime.

It is a super-2 number, since 2×40263649² = 3242322861590402, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (40263149) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20131824 + 20131825.

It is an arithmetic number, because the mean of its divisors is an integer number (20131825).

Almost surely, 2^40263649 is an apocalyptic number.

It is an amenable number.

40263649 is a deficient number, since it is larger than the sum of its proper divisors (1).

40263649 is an equidigital number, since it uses as much as digits as its factorization.

40263649 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 31104, while the sum is 34.

The square root of 40263649 is about 6345.3643709404. The cubic root of 40263649 is about 342.7449335764.

The spelling of 40263649 in words is "forty million, two hundred sixty-three thousand, six hundred forty-nine".