97981351 has 4 divisors (see below), whose sum is σ = 105518392. Its totient is φ = 90444312.

The previous prime is 97981339. The next prime is 97981361. The reversal of 97981351 is 15318979.

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 97981351 - 2⁷ = 97981223 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 97981298 and 97981307.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (97981321) 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, 3768501 + ... + 3768526.

It is an arithmetic number, because the mean of its divisors is an integer number (26379598).

Almost surely, 2^97981351 is an apocalyptic number.

97981351 is a deficient number, since it is larger than the sum of its proper divisors (7537041).

97981351 is a wasteful number, since it uses less digits than its factorization.

97981351 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7537040.

The product of its digits is 68040, while the sum is 43.

The square root of 97981351 is about 9898.5529750565. The cubic root of 97981351 is about 461.0143824436.

The spelling of 97981351 in words is "ninety-seven million, nine hundred eighty-one thousand, three hundred fifty-one".