37721341243 has 2 divisors, whose sum is σ = 37721341244. Its totient is φ = 37721341242.

The previous prime is 37721341201. The next prime is 37721341249. The reversal of 37721341243 is 34214312773.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 37721341243 - 2²⁵ = 37687786811 is a prime.

It is not a weakly prime, because it can be changed into another prime (37721341249) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 18860670621 + 18860670622.

It is an arithmetic number, because the mean of its divisors is an integer number (18860670622).

Almost surely, 2^37721341243 is an apocalyptic number.

37721341243 is a deficient number, since it is larger than the sum of its proper divisors (1).

37721341243 is an equidigital number, since it uses as much as digits as its factorization.

37721341243 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 84672, while the sum is 37.

The spelling of 37721341243 in words is "thirty-seven billion, seven hundred twenty-one million, three hundred forty-one thousand, two hundred forty-three".