70320645 has 24 divisors (see below), whose sum is σ = 122649696. Its totient is φ = 37270368.

The previous prime is 70320643. The next prime is 70320647. The reversal of 70320645 is 54602307.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (70320643) and next prime (70320647).

It is not a de Polignac number, because 70320645 - 2¹ = 70320643 is a prime.

It is a super-2 number, since 2×70320645² = 9889986226432050, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (70320641) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2542 + ... + 12128.

It is an arithmetic number, because the mean of its divisors is an integer number (5110404).

Almost surely, 2^70320645 is an apocalyptic number.

It is an amenable number.

70320645 is a deficient number, since it is larger than the sum of its proper divisors (52329051).

70320645 is a wasteful number, since it uses less digits than its factorization.

70320645 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9761 (or 9758 counting only the distinct ones).

The product of its (nonzero) digits is 5040, while the sum is 27.

The square root of 70320645 is about 8385.7405755246. The cubic root of 70320645 is about 412.7568427987.

The spelling of 70320645 in words is "seventy million, three hundred twenty thousand, six hundred forty-five".