97019999 has 4 divisors (see below), whose sum is σ = 97784064. Its totient is φ = 96255936.

The previous prime is 97019983. The next prime is 97020017. The reversal of 97019999 is 99991079.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 99991079 = 2767 ⋅36137.

It is a cyclic number.

It is not a de Polignac number, because 97019999 - 2⁴ = 97019983 is a prime.

It is a Duffinian number.

97019999 is a modest number, since divided by 9999 gives 9701 as remainder.

It is a self number, because there is not a number n which added to its sum of digits gives 97019999.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (97019929) 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, 381842 + ... + 382095.

It is an arithmetic number, because the mean of its divisors is an integer number (24446016).

Almost surely, 2^97019999 is an apocalyptic number.

97019999 is a deficient number, since it is larger than the sum of its proper divisors (764065).

97019999 is a wasteful number, since it uses less digits than its factorization.

97019999 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 764064.

The product of its (nonzero) digits is 413343, while the sum is 53.

The square root of 97019999 is about 9849.8730448671. The cubic root of 97019999 is about 459.5016641722.

The spelling of 97019999 in words is "ninety-seven million, nineteen thousand, nine hundred ninety-nine".