97849439 has 4 divisors (see below), whose sum is σ = 97870224. Its totient is φ = 97828656.

The previous prime is 97849417. The next prime is 97849457. The reversal of 97849439 is 93494879.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-97849439 is a prime.

It is a super-2 number, since 2×97849439² = 19149025425229442, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (97849459) 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, 419 + ... + 13995.

It is an arithmetic number, because the mean of its divisors is an integer number (24467556).

Almost surely, 2^97849439 is an apocalyptic number.

97849439 is a deficient number, since it is larger than the sum of its proper divisors (20785).

97849439 is a wasteful number, since it uses less digits than its factorization.

97849439 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20784.

The product of its digits is 1959552, while the sum is 53.

The square root of 97849439 is about 9891.8875347428. The cubic root of 97849439 is about 460.8074021018.

The spelling of 97849439 in words is "ninety-seven million, eight hundred forty-nine thousand, four hundred thirty-nine".