97139293 has 2 divisors, whose sum is σ = 97139294. Its totient is φ = 97139292.

The previous prime is 97139257. The next prime is 97139303. The reversal of 97139293 is 39293179.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 96000804 + 1138489 = 9798^2 + 1067^2 .

It is an emirp because it is prime and its reverse (39293179) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 97139293 - 2⁹ = 97138781 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (97139233) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 48569646 + 48569647.

It is an arithmetic number, because the mean of its divisors is an integer number (48569647).

Almost surely, 2^97139293 is an apocalyptic number.

It is an amenable number.

97139293 is a deficient number, since it is larger than the sum of its proper divisors (1).

97139293 is an equidigital number, since it uses as much as digits as its factorization.

97139293 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 91854, while the sum is 43.

The square root of 97139293 is about 9855.9267955885. The cubic root of 97139293 is about 459.6899186235.

The spelling of 97139293 in words is "ninety-seven million, one hundred thirty-nine thousand, two hundred ninety-three".