40152493 has 2 divisors, whose sum is σ = 40152494. Its totient is φ = 40152492.

The previous prime is 40152421. The next prime is 40152517. The reversal of 40152493 is 39425104.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 39904489 + 248004 = 6317^2 + 498^2 .

It is a cyclic number.

It is not a de Polignac number, because 40152493 - 2¹³ = 40144301 is a prime.

It is a super-2 number, since 2×40152493² = 3224445388230098, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (40152293) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20076246 + 20076247.

It is an arithmetic number, because the mean of its divisors is an integer number (20076247).

Almost surely, 2^40152493 is an apocalyptic number.

It is an amenable number.

40152493 is a deficient number, since it is larger than the sum of its proper divisors (1).

40152493 is an equidigital number, since it uses as much as digits as its factorization.

40152493 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4320, while the sum is 28.

The square root of 40152493 is about 6336.5994823722. The cubic root of 40152493 is about 342.4292371613.

Adding to 40152493 its reverse (39425104), we get a palindrome (79577597).

The spelling of 40152493 in words is "forty million, one hundred fifty-two thousand, four hundred ninety-three".