40530389 has 2 divisors, whose sum is σ = 40530390. Its totient is φ = 40530388.

The previous prime is 40530367. The next prime is 40530407. The reversal of 40530389 is 98303504.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 39564100 + 966289 = 6290^2 + 983^2 .

It is a cyclic number.

It is not a de Polignac number, because 40530389 - 2¹² = 40526293 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (40530359) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20265194 + 20265195.

It is an arithmetic number, because the mean of its divisors is an integer number (20265195).

Almost surely, 2^40530389 is an apocalyptic number.

It is an amenable number.

40530389 is a deficient number, since it is larger than the sum of its proper divisors (1).

40530389 is an equidigital number, since it uses as much as digits as its factorization.

40530389 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 12960, while the sum is 32.

The square root of 40530389 is about 6366.3481682987. The cubic root of 40530389 is about 343.5001444303.

The spelling of 40530389 in words is "forty million, five hundred thirty thousand, three hundred eighty-nine".