97749931 has 8 divisors (see below), whose sum is σ = 102574080. Its totient is φ = 92973672.

The previous prime is 97749929. The next prime is 97749937. The reversal of 97749931 is 13994779.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 97749931 - 2¹ = 97749929 is a prime.

It is a super-2 number, since 2×97749931² = 19110098021009522, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (97749937) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7755 + ... + 15988.

It is an arithmetic number, because the mean of its divisors is an integer number (12821760).

Almost surely, 2^97749931 is an apocalyptic number.

97749931 is a deficient number, since it is larger than the sum of its proper divisors (4824149).

97749931 is a wasteful number, since it uses less digits than its factorization.

97749931 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23945.

The product of its digits is 428652, while the sum is 49.

The square root of 97749931 is about 9886.8564771620. The cubic root of 97749931 is about 460.6511430710.

The spelling of 97749931 in words is "ninety-seven million, seven hundred forty-nine thousand, nine hundred thirty-one".