70651723 has 4 divisors (see below), whose sum is σ = 70680600. Its totient is φ = 70622848.

The previous prime is 70651681. The next prime is 70651771. The reversal of 70651723 is 32715607.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 32715607 = 73 ⋅448159.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-70651723 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (70651783) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10390 + ... + 15787.

It is an arithmetic number, because the mean of its divisors is an integer number (17670150).

Almost surely, 2^70651723 is an apocalyptic number.

70651723 is a deficient number, since it is larger than the sum of its proper divisors (28877).

70651723 is a wasteful number, since it uses less digits than its factorization.

70651723 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28876.

The product of its (nonzero) digits is 8820, while the sum is 31.

The square root of 70651723 is about 8405.4579292267. The cubic root of 70651723 is about 413.4035983708.

The spelling of 70651723 in words is "seventy million, six hundred fifty-one thousand, seven hundred twenty-three".