97391709 has 24 divisors (see below), whose sum is σ = 143391872. Its totient is φ = 63685440.

The previous prime is 97391647. The next prime is 97391731. The reversal of 97391709 is 90719379.

It is not a de Polignac number, because 97391709 - 2¹² = 97387613 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (97391779) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 177774 + ... + 178320.

Almost surely, 2^97391709 is an apocalyptic number.

It is an amenable number.

97391709 is a deficient number, since it is larger than the sum of its proper divisors (46000163).

97391709 is a wasteful number, since it uses less digits than its factorization.

97391709 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 897 (or 894 counting only the distinct ones).

The product of its (nonzero) digits is 107163, while the sum is 45.

The square root of 97391709 is about 9868.7237776726. The cubic root of 97391709 is about 460.0877416120.

The spelling of 97391709 in words is "ninety-seven million, three hundred ninety-one thousand, seven hundred nine".