97139737 has 2 divisors, whose sum is σ = 97139738. Its totient is φ = 97139736.

The previous prime is 97139677. The next prime is 97139747. The reversal of 97139737 is 73793179.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 86044176 + 11095561 = 9276^2 + 3331^2 .

It is an emirp because it is prime and its reverse (73793179) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-97139737 is a prime.

It is a super-2 number, since 2×97139737² = 18872257008858338, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (97139747) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 48569868 + 48569869.

It is an arithmetic number, because the mean of its divisors is an integer number (48569869).

Almost surely, 2^97139737 is an apocalyptic number.

It is an amenable number.

97139737 is a deficient number, since it is larger than the sum of its proper divisors (1).

97139737 is an equidigital number, since it uses as much as digits as its factorization.

97139737 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 250047, while the sum is 46.

The square root of 97139737 is about 9855.9493200807. The cubic root of 97139737 is about 459.6906189992.

The spelling of 97139737 in words is "ninety-seven million, one hundred thirty-nine thousand, seven hundred thirty-seven".