97788155 has 8 divisors (see below), whose sum is σ = 123522000. Its totient is φ = 74113056.

The previous prime is 97788137. The next prime is 97788169. The reversal of 97788155 is 55188779.

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 97788155 - 2⁶ = 97788091 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 514580 + ... + 514769.

It is an arithmetic number, because the mean of its divisors is an integer number (15440250).

Almost surely, 2^97788155 is an apocalyptic number.

97788155 is a gapful number since it is divisible by the number (95) formed by its first and last digit.

97788155 is a deficient number, since it is larger than the sum of its proper divisors (25733845).

97788155 is a wasteful number, since it uses less digits than its factorization.

97788155 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1029373.

The product of its digits is 705600, while the sum is 50.

The square root of 97788155 is about 9888.7893596739. The cubic root of 97788155 is about 460.7111793782.

The spelling of 97788155 in words is "ninety-seven million, seven hundred eighty-eight thousand, one hundred fifty-five".