40120699429 has 2 divisors, whose sum is σ = 40120699430. Its totient is φ = 40120699428.

The previous prime is 40120699369. The next prime is 40120699433. The reversal of 40120699429 is 92499602104.

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., 37897576929 + 2223122500 = 194673^2 + 47150^2 .

It is a cyclic number.

It is not a de Polignac number, because 40120699429 - 2⁷ = 40120699301 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (40120699439) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20060349714 + 20060349715.

It is an arithmetic number, because the mean of its divisors is an integer number (20060349715).

Almost surely, 2^40120699429 is an apocalyptic number.

It is an amenable number.

40120699429 is a deficient number, since it is larger than the sum of its proper divisors (1).

40120699429 is an equidigital number, since it uses as much as digits as its factorization.

40120699429 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 279936, while the sum is 46.

The spelling of 40120699429 in words is "forty billion, one hundred twenty million, six hundred ninety-nine thousand, four hundred twenty-nine".