78170253 has 8 divisors (see below), whose sum is σ = 119116608. Its totient is φ = 44668704.

The previous prime is 78170243. The next prime is 78170269. The reversal of 78170253 is 35207187.

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

It is not a de Polignac number, because 78170253 - 2¹⁰ = 78169229 is a prime.

It is a super-2 number, since 2×78170253² = 12221176908168018, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78170243) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1861176 + ... + 1861217.

It is an arithmetic number, because the mean of its divisors is an integer number (14889576).

Almost surely, 2^78170253 is an apocalyptic number.

It is an amenable number.

78170253 is a deficient number, since it is larger than the sum of its proper divisors (40946355).

78170253 is a wasteful number, since it uses less digits than its factorization.

78170253 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3722403.

The product of its (nonzero) digits is 11760, while the sum is 33.

The square root of 78170253 is about 8841.3942904951. The cubic root of 78170253 is about 427.5765110484.

The spelling of 78170253 in words is "seventy-eight million, one hundred seventy thousand, two hundred fifty-three".