40180993 has 2 divisors, whose sum is σ = 40180994. Its totient is φ = 40180992.

The previous prime is 40180957. The next prime is 40180999. The reversal of 40180993 is 39908104.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 24681024 + 15499969 = 4968^2 + 3937^2 .

It is a cyclic number.

It is not a de Polignac number, because 40180993 - 2¹⁷ = 40049921 is a prime.

It is a super-2 number, since 2×40180993² = 3229024396932098, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (40180999) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20090496 + 20090497.

It is an arithmetic number, because the mean of its divisors is an integer number (20090497).

Almost surely, 2^40180993 is an apocalyptic number.

It is an amenable number.

40180993 is a deficient number, since it is larger than the sum of its proper divisors (1).

40180993 is an equidigital number, since it uses as much as digits as its factorization.

40180993 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 7776, while the sum is 34.

The square root of 40180993 is about 6338.8479237161. The cubic root of 40180993 is about 342.5102360768.

The spelling of 40180993 in words is "forty million, one hundred eighty thousand, nine hundred ninety-three".