99701551 has 2 divisors, whose sum is σ = 99701552. Its totient is φ = 99701550.

The previous prime is 99701543. The next prime is 99701557. The reversal of 99701551 is 15510799.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 99701551 - 2³ = 99701543 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 99701551.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (99701557) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 49850775 + 49850776.

It is an arithmetic number, because the mean of its divisors is an integer number (49850776).

Almost surely, 2^99701551 is an apocalyptic number.

99701551 is a deficient number, since it is larger than the sum of its proper divisors (1).

99701551 is an equidigital number, since it uses as much as digits as its factorization.

99701551 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 14175, while the sum is 37.

The square root of 99701551 is about 9985.0663993786. The cubic root of 99701551 is about 463.6966640443.

The spelling of 99701551 in words is "ninety-nine million, seven hundred one thousand, five hundred fifty-one".