40203973 has 2 divisors, whose sum is σ = 40203974. Its totient is φ = 40203972.

The previous prime is 40203971. The next prime is 40203979. The reversal of 40203973 is 37930204.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 26193924 + 14010049 = 5118^2 + 3743^2 .

It is a cyclic number.

It is not a de Polignac number, because 40203973 - 2¹ = 40203971 is a prime.

Together with 40203971, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (40203971) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20101986 + 20101987.

It is an arithmetic number, because the mean of its divisors is an integer number (20101987).

Almost surely, 2^40203973 is an apocalyptic number.

It is an amenable number.

40203973 is a deficient number, since it is larger than the sum of its proper divisors (1).

40203973 is an equidigital number, since it uses as much as digits as its factorization.

40203973 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4536, while the sum is 28.

The square root of 40203973 is about 6340.6602968461. The cubic root of 40203973 is about 342.5755188936.

The spelling of 40203973 in words is "forty million, two hundred three thousand, nine hundred seventy-three".