97749487 has 12 divisors (see below), whose sum is σ = 108306688. Its totient is φ = 88149600.

The previous prime is 97749481. The next prime is 97749497. The reversal of 97749487 is 78494779.

It is a de Polignac number, because none of the positive numbers 2^k-97749487 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 (97749481) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 12187 + ... + 18547.

Almost surely, 2^97749487 is an apocalyptic number.

97749487 is a deficient number, since it is larger than the sum of its proper divisors (10557201).

97749487 is a wasteful number, since it uses less digits than its factorization.

97749487 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6510 (or 6499 counting only the distinct ones).

The product of its digits is 3556224, while the sum is 55.

The square root of 97749487 is about 9886.8340230834. The cubic root of 97749487 is about 460.6504456130.

The spelling of 97749487 in words is "ninety-seven million, seven hundred forty-nine thousand, four hundred eighty-seven".