99019951 has 4 divisors (see below), whose sum is σ = 104844672. Its totient is φ = 93195232.

The previous prime is 99019933. The next prime is 99019969. The reversal of 99019951 is 15991099.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 15991099 = 2939 ⋅5441.

It is an interprime number because it is at equal distance from previous prime (99019933) and next prime (99019969).

It is a cyclic number.

It is not a de Polignac number, because 99019951 - 2⁵ = 99019919 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 99019898 and 99019907.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (99019931) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2912335 + ... + 2912368.

It is an arithmetic number, because the mean of its divisors is an integer number (26211168).

Almost surely, 2^99019951 is an apocalyptic number.

99019951 is a deficient number, since it is larger than the sum of its proper divisors (5824721).

99019951 is a wasteful number, since it uses less digits than its factorization.

99019951 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5824720.

The product of its (nonzero) digits is 32805, while the sum is 43.

The square root of 99019951 is about 9950.8768960328. The cubic root of 99019951 is about 462.6375744616.

The spelling of 99019951 in words is "ninety-nine million, nineteen thousand, nine hundred fifty-one".