43742923157 has 2 divisors, whose sum is σ = 43742923158. Its totient is φ = 43742923156.

The previous prime is 43742923153. The next prime is 43742923163. The reversal of 43742923157 is 75132924734.

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., 30980928196 + 12761994961 = 176014^2 + 112969^2 .

It is a cyclic number.

It is not a de Polignac number, because 43742923157 - 2² = 43742923153 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (43742923151) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21871461578 + 21871461579.

It is an arithmetic number, because the mean of its divisors is an integer number (21871461579).

Almost surely, 2^43742923157 is an apocalyptic number.

It is an amenable number.

43742923157 is a deficient number, since it is larger than the sum of its proper divisors (1).

43742923157 is an equidigital number, since it uses as much as digits as its factorization.

43742923157 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1270080, while the sum is 47.

The spelling of 43742923157 in words is "forty-three billion, seven hundred forty-two million, nine hundred twenty-three thousand, one hundred fifty-seven".