81437107 has 2 divisors, whose sum is σ = 81437108. Its totient is φ = 81437106.

The previous prime is 81437101. The next prime is 81437113. The reversal of 81437107 is 70173418.

It is a balanced prime because it is at equal distance from previous prime (81437101) and next prime (81437113).

It is a cyclic number.

It is not a de Polignac number, because 81437107 - 2¹¹ = 81435059 is a prime.

It is not a weakly prime, because it can be changed into another prime (81437101) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 40718553 + 40718554.

It is an arithmetic number, because the mean of its divisors is an integer number (40718554).

Almost surely, 2^81437107 is an apocalyptic number.

81437107 is a deficient number, since it is larger than the sum of its proper divisors (1).

81437107 is an equidigital number, since it uses as much as digits as its factorization.

81437107 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4704, while the sum is 31.

The square root of 81437107 is about 9024.2510492561. The cubic root of 81437107 is about 433.4517683506.

The spelling of 81437107 in words is "eighty-one million, four hundred thirty-seven thousand, one hundred seven".