70342649 has 4 divisors (see below), whose sum is σ = 75753636. Its totient is φ = 64931664.

The previous prime is 70342639. The next prime is 70342667. The reversal of 70342649 is 94624307.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 94624307 = 31 ⋅3052397.

It can be written as a sum of positive squares in 2 ways, for example, as 13987600 + 56355049 = 3740^2 + 7507^2 .

It is a cyclic number.

It is not a de Polignac number, because 70342649 - 2²⁰ = 69294073 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (70342609) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2705474 + ... + 2705499.

It is an arithmetic number, because the mean of its divisors is an integer number (18938409).

Almost surely, 2^70342649 is an apocalyptic number.

It is an amenable number.

70342649 is a deficient number, since it is larger than the sum of its proper divisors (5410987).

70342649 is a wasteful number, since it uses less digits than its factorization.

70342649 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5410986.

The product of its (nonzero) digits is 36288, while the sum is 35.

The square root of 70342649 is about 8387.0524619797. The cubic root of 70342649 is about 412.7998901589.

The spelling of 70342649 in words is "seventy million, three hundred forty-two thousand, six hundred forty-nine".