70722385 has 4 divisors (see below), whose sum is σ = 84866868. Its totient is φ = 56577904.

The previous prime is 70722367. The next prime is 70722413. The reversal of 70722385 is 58322707.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 58322707 = 2311 ⋅25237.

It can be written as a sum of positive squares in 2 ways, for example, as 13220496 + 57501889 = 3636^2 + 7583^2 .

It is a cyclic number.

It is not a de Polignac number, because 70722385 - 2⁹ = 70721873 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 70722385.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7072234 + ... + 7072243.

It is an arithmetic number, because the mean of its divisors is an integer number (21216717).

Almost surely, 2^70722385 is an apocalyptic number.

It is an amenable number.

70722385 is a deficient number, since it is larger than the sum of its proper divisors (14144483).

70722385 is a wasteful number, since it uses less digits than its factorization.

70722385 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14144482.

The product of its (nonzero) digits is 23520, while the sum is 34.

The square root of 70722385 is about 8409.6602190576. The cubic root of 70722385 is about 413.5413736932.

The spelling of 70722385 in words is "seventy million, seven hundred twenty-two thousand, three hundred eighty-five".