40090973 has 8 divisors (see below), whose sum is σ = 43621368. Its totient is φ = 36624384.

The previous prime is 40090937. The next prime is 40090987. The reversal of 40090973 is 37909004.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 3452164 + 36638809 = 1858^2 + 6053^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 40090973 - 2²² = 35896669 is a prime.

It is a super-2 number, since 2×40090973² = 3214572232173458, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40090903) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 14636 + ... + 17157.

It is an arithmetic number, because the mean of its divisors is an integer number (5452671).

Almost surely, 2^40090973 is an apocalyptic number.

It is an amenable number.

40090973 is a deficient number, since it is larger than the sum of its proper divisors (3530395).

40090973 is a wasteful number, since it uses less digits than its factorization.

40090973 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31903.

The product of its (nonzero) digits is 6804, while the sum is 32.

The square root of 40090973 is about 6331.7432828566. The cubic root of 40090973 is about 342.2542624320.

Adding to 40090973 its reverse (37909004), we get a palindrome (77999977).

The spelling of 40090973 in words is "forty million, ninety thousand, nine hundred seventy-three".