97139047 has 2 divisors, whose sum is σ = 97139048. Its totient is φ = 97139046.

The previous prime is 97139033. The next prime is 97139069. The reversal of 97139047 is 74093179.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 97139047 - 2⁷ = 97138919 is a prime.

It is a nialpdrome in base 14.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (97139447) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 48569523 + 48569524.

It is an arithmetic number, because the mean of its divisors is an integer number (48569524).

Almost surely, 2^97139047 is an apocalyptic number.

97139047 is a deficient number, since it is larger than the sum of its proper divisors (1).

97139047 is an equidigital number, since it uses as much as digits as its factorization.

97139047 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 47628, while the sum is 40.

The square root of 97139047 is about 9855.9143157801. The cubic root of 97139047 is about 459.6895305765.

The spelling of 97139047 in words is "ninety-seven million, one hundred thirty-nine thousand, forty-seven".