40698643 has 4 divisors (see below), whose sum is σ = 40736008. Its totient is φ = 40661280.

The previous prime is 40698641. The next prime is 40698653. The reversal of 40698643 is 34689604.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 40698643 - 2¹ = 40698641 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 40698596 and 40698605.

It is not an unprimeable number, because it can be changed into a prime (40698641) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 16998 + ... + 19243.

It is an arithmetic number, because the mean of its divisors is an integer number (10184002).

Almost surely, 2^40698643 is an apocalyptic number.

40698643 is a deficient number, since it is larger than the sum of its proper divisors (37365).

40698643 is a wasteful number, since it uses less digits than its factorization.

40698643 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37364.

The product of its (nonzero) digits is 124416, while the sum is 40.

The square root of 40698643 is about 6379.5488084974. The cubic root of 40698643 is about 343.9748128079.

The spelling of 40698643 in words is "forty million, six hundred ninety-eight thousand, six hundred forty-three".