97451813 has 2 divisors, whose sum is σ = 97451814. Its totient is φ = 97451812.

The previous prime is 97451807. The next prime is 97451819. The reversal of 97451813 is 31815479.

It is a balanced prime because it is at equal distance from previous prime (97451807) and next prime (97451819).

It can be written as a sum of positive squares in only one way, i.e., 55681444 + 41770369 = 7462^2 + 6463^2 .

It is a cyclic number.

It is not a de Polignac number, because 97451813 - 2⁴ = 97451797 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (97451819) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 48725906 + 48725907.

It is an arithmetic number, because the mean of its divisors is an integer number (48725907).

Almost surely, 2^97451813 is an apocalyptic number.

It is an amenable number.

97451813 is a deficient number, since it is larger than the sum of its proper divisors (1).

97451813 is an equidigital number, since it uses as much as digits as its factorization.

97451813 is an evil number, because the sum of its binary digits is even.

The product of its digits is 30240, while the sum is 38.

The square root of 97451813 is about 9871.7684839141. The cubic root of 97451813 is about 460.1823678290.

The spelling of 97451813 in words is "ninety-seven million, four hundred fifty-one thousand, eight hundred thirteen".