40981207 has 4 divisors (see below), whose sum is σ = 41441760. Its totient is φ = 40520656.

The previous prime is 40981189. The next prime is 40981211. The reversal of 40981207 is 70218904.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-40981207 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40981217) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 230143 + ... + 230320.

It is an arithmetic number, because the mean of its divisors is an integer number (10360440).

Almost surely, 2^40981207 is an apocalyptic number.

40981207 is a deficient number, since it is larger than the sum of its proper divisors (460553).

40981207 is an equidigital number, since it uses as much as digits as its factorization.

40981207 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 460552.

The product of its (nonzero) digits is 4032, while the sum is 31.

The square root of 40981207 is about 6401.6565824793. The cubic root of 40981207 is about 344.7690311519.

The spelling of 40981207 in words is "forty million, nine hundred eighty-one thousand, two hundred seven".