37400729 has 2 divisors, whose sum is σ = 37400730. Its totient is φ = 37400728.

The previous prime is 37400723. The next prime is 37400743. The reversal of 37400729 is 92700473.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 26245129 + 11155600 = 5123^2 + 3340^2 .

It is a cyclic number.

It is not a de Polignac number, because 37400729 - 2²⁰ = 36352153 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 37400695 and 37400704.

It is not a weakly prime, because it can be changed into another prime (37400723) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 18700364 + 18700365.

It is an arithmetic number, because the mean of its divisors is an integer number (18700365).

Almost surely, 2^37400729 is an apocalyptic number.

It is an amenable number.

37400729 is a deficient number, since it is larger than the sum of its proper divisors (1).

37400729 is an equidigital number, since it uses as much as digits as its factorization.

37400729 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 10584, while the sum is 32.

The square root of 37400729 is about 6115.6135424011. The cubic root of 37400729 is about 334.4208572388.

The spelling of 37400729 in words is "thirty-seven million, four hundred thousand, seven hundred twenty-nine".