40821707 has 2 divisors, whose sum is σ = 40821708. Its totient is φ = 40821706.

The previous prime is 40821701. The next prime is 40821779. The reversal of 40821707 is 70712804.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 40821707 - 2¹⁶ = 40756171 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 40821707.

It is not a weakly prime, because it can be changed into another prime (40821701) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20410853 + 20410854.

It is an arithmetic number, because the mean of its divisors is an integer number (20410854).

Almost surely, 2^40821707 is an apocalyptic number.

40821707 is a deficient number, since it is larger than the sum of its proper divisors (1).

40821707 is an equidigital number, since it uses as much as digits as its factorization.

40821707 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3136, while the sum is 29.

The square root of 40821707 is about 6389.1867244588. The cubic root of 40821707 is about 344.3211660540.

The spelling of 40821707 in words is "forty million, eight hundred twenty-one thousand, seven hundred seven".