97439999 has 4 divisors (see below), whose sum is σ = 102568440. Its totient is φ = 92311560.

The previous prime is 97439989. The next prime is 97440019. The reversal of 97439999 is 99993479.

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

It is a cyclic number.

It is not a de Polignac number, because 97439999 - 2¹² = 97435903 is a prime.

It is a Duffinian number.

97439999 is a modest number, since divided by 9999 gives 9743 as remainder.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (97439939) 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, 2564192 + ... + 2564229.

It is an arithmetic number, because the mean of its divisors is an integer number (25642110).

Almost surely, 2^97439999 is an apocalyptic number.

97439999 is a deficient number, since it is larger than the sum of its proper divisors (5128441).

97439999 is a wasteful number, since it uses less digits than its factorization.

97439999 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5128440.

The product of its digits is 4960116, while the sum is 59.

The square root of 97439999 is about 9871.1700927499. The cubic root of 97439999 is about 460.1637712391.

The spelling of 97439999 in words is "ninety-seven million, four hundred thirty-nine thousand, nine hundred ninety-nine".