99471397 has 2 divisors, whose sum is σ = 99471398. Its totient is φ = 99471396.

The previous prime is 99471391. The next prime is 99471409. The reversal of 99471397 is 79317499.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 68657796 + 30813601 = 8286^2 + 5551^2 .

It is a cyclic number.

It is not a de Polignac number, because 99471397 - 2¹⁹ = 98947109 is a prime.

It is a super-2 number, since 2×99471397² = 19789117642263218, which contains 22 as substring.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 99471397.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (99471391) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 49735698 + 49735699.

It is an arithmetic number, because the mean of its divisors is an integer number (49735699).

Almost surely, 2^99471397 is an apocalyptic number.

It is an amenable number.

99471397 is a deficient number, since it is larger than the sum of its proper divisors (1).

99471397 is an equidigital number, since it uses as much as digits as its factorization.

99471397 is an evil number, because the sum of its binary digits is even.

The product of its digits is 428652, while the sum is 49.

The square root of 99471397 is about 9973.5348297382. The cubic root of 99471397 is about 463.3395854558.

The spelling of 99471397 in words is "ninety-nine million, four hundred seventy-one thousand, three hundred ninety-seven".