40165953 has 4 divisors (see below), whose sum is σ = 53554608. Its totient is φ = 26777300.

The previous prime is 40165949. The next prime is 40165969. The reversal of 40165953 is 35956104.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 40165953 - 2² = 40165949 is a prime.

It is a super-2 number, since 2×40165953² = 3226607560796418, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (40165903) 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, 6694323 + ... + 6694328.

It is an arithmetic number, because the mean of its divisors is an integer number (13388652).

Almost surely, 2^40165953 is an apocalyptic number.

It is an amenable number.

40165953 is a deficient number, since it is larger than the sum of its proper divisors (13388655).

40165953 is a wasteful number, since it uses less digits than its factorization.

40165953 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13388654.

The product of its (nonzero) digits is 16200, while the sum is 33.

The square root of 40165953 is about 6337.6614772327. The cubic root of 40165953 is about 342.4674961606.

The spelling of 40165953 in words is "forty million, one hundred sixty-five thousand, nine hundred fifty-three".