97219989 has 12 divisors (see below), whose sum is σ = 140629996. Its totient is φ = 64720512.

The previous prime is 97219981. The next prime is 97220003. The reversal of 97219989 is 98991279.

It can be written as a sum of positive squares in 2 ways, for example, as 90155025 + 7064964 = 9495^2 + 2658^2 .

It is not a de Polignac number, because 97219989 - 2³ = 97219981 is a prime.

It is a super-2 number, since 2×97219989² = 18903452522320242, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (97219981) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 772 + ... + 13965.

Almost surely, 2^97219989 is an apocalyptic number.

It is an amenable number.

97219989 is a deficient number, since it is larger than the sum of its proper divisors (43410007).

97219989 is a wasteful number, since it uses less digits than its factorization.

97219989 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15476 (or 15473 counting only the distinct ones).

The product of its digits is 734832, while the sum is 54.

The square root of 97219989 is about 9860.0197261466. The cubic root of 97219989 is about 459.8171752990.

The spelling of 97219989 in words is "ninety-seven million, two hundred nineteen thousand, nine hundred eighty-nine".