99405451 has 2 divisors, whose sum is σ = 99405452. Its totient is φ = 99405450.

The previous prime is 99405431. The next prime is 99405479. The reversal of 99405451 is 15450499.

It is a weak prime.

It is an emirp because it is prime and its reverse (15450499) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 99405451 - 2⁹ = 99404939 is a prime.

It is a super-3 number, since 3×99405451³ (a number of 25 digits) contains 333 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 99405451.

It is not a weakly prime, because it can be changed into another prime (99405431) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 49702725 + 49702726.

It is an arithmetic number, because the mean of its divisors is an integer number (49702726).

Almost surely, 2^99405451 is an apocalyptic number.

99405451 is a deficient number, since it is larger than the sum of its proper divisors (1).

99405451 is an equidigital number, since it uses as much as digits as its factorization.

99405451 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 32400, while the sum is 37.

The square root of 99405451 is about 9970.2282320918. The cubic root of 99405451 is about 463.2371702621.

It can be divided in two parts, 99405 and 451, that added together give a square (99856 = 316²).

The spelling of 99405451 in words is "ninety-nine million, four hundred five thousand, four hundred fifty-one".