40051489 has 2 divisors, whose sum is σ = 40051490. Its totient is φ = 40051488.

The previous prime is 40051457. The next prime is 40051511. The reversal of 40051489 is 98415004.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 39438400 + 613089 = 6280^2 + 783^2 .

It is a cyclic number.

It is not a de Polignac number, because 40051489 - 2⁵ = 40051457 is a prime.

It is a super-2 number, since 2×40051489² = 3208243542234242, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 40051489.

It is not a weakly prime, because it can be changed into another prime (40051409) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20025744 + 20025745.

It is an arithmetic number, because the mean of its divisors is an integer number (20025745).

Almost surely, 2^40051489 is an apocalyptic number.

It is an amenable number.

40051489 is a deficient number, since it is larger than the sum of its proper divisors (1).

40051489 is an equidigital number, since it uses as much as digits as its factorization.

40051489 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5760, while the sum is 31.

The square root of 40051489 is about 6328.6245741077. The cubic root of 40051489 is about 342.1418680030.

The spelling of 40051489 in words is "forty million, fifty-one thousand, four hundred eighty-nine".