43013137 has 2 divisors, whose sum is σ = 43013138. Its totient is φ = 43013136.

The previous prime is 43013101. The next prime is 43013143. The reversal of 43013137 is 73131034.

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., 28259856 + 14753281 = 5316^2 + 3841^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-43013137 is a prime.

It is not a weakly prime, because it can be changed into another prime (43013147) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21506568 + 21506569.

It is an arithmetic number, because the mean of its divisors is an integer number (21506569).

Almost surely, 2^43013137 is an apocalyptic number.

It is an amenable number.

43013137 is a deficient number, since it is larger than the sum of its proper divisors (1).

43013137 is an equidigital number, since it uses as much as digits as its factorization.

43013137 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 756, while the sum is 22.

The square root of 43013137 is about 6558.4401346662. The cubic root of 43013137 is about 350.3754800341.

The spelling of 43013137 in words is "forty-three million, thirteen thousand, one hundred thirty-seven".