42340232437 has 2 divisors, whose sum is σ = 42340232438. Its totient is φ = 42340232436.

The previous prime is 42340232383. The next prime is 42340232443. The reversal of 42340232437 is 73423204324.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 41828839441 + 511392996 = 204521^2 + 22614^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-42340232437 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (42340232447) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21170116218 + 21170116219.

It is an arithmetic number, because the mean of its divisors is an integer number (21170116219).

Almost surely, 2^42340232437 is an apocalyptic number.

It is an amenable number.

42340232437 is a deficient number, since it is larger than the sum of its proper divisors (1).

42340232437 is an equidigital number, since it uses as much as digits as its factorization.

42340232437 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 96768, while the sum is 34.

The spelling of 42340232437 in words is "forty-two billion, three hundred forty million, two hundred thirty-two thousand, four hundred thirty-seven".