40948991 has 4 divisors (see below), whose sum is σ = 41271552. Its totient is φ = 40626432.

The previous prime is 40948987. The next prime is 40948997. The reversal of 40948991 is 19984904.

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 40948991 - 2² = 40948987 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 (40948997) 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, 161090 + ... + 161343.

It is an arithmetic number, because the mean of its divisors is an integer number (10317888).

Almost surely, 2^40948991 is an apocalyptic number.

40948991 is a deficient number, since it is larger than the sum of its proper divisors (322561).

40948991 is a wasteful number, since it uses less digits than its factorization.

40948991 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 322560.

The product of its (nonzero) digits is 93312, while the sum is 44.

The square root of 40948991 is about 6399.1398640755. The cubic root of 40948991 is about 344.6786646020.

The spelling of 40948991 in words is "forty million, nine hundred forty-eight thousand, nine hundred ninety-one".