70312305 has 48 divisors (see below), whose sum is σ = 131721984. Its totient is φ = 31933440.

The previous prime is 70312301. The next prime is 70312313. The reversal of 70312305 is 50321307.

It is a happy number.

It is not a de Polignac number, because 70312305 - 2² = 70312301 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (70312301) 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 47 ways as a sum of consecutive naturals, for example, 199009 + ... + 199361.

It is an arithmetic number, because the mean of its divisors is an integer number (2744208).

Almost surely, 2^70312305 is an apocalyptic number.

It is an amenable number.

70312305 is a deficient number, since it is larger than the sum of its proper divisors (61409679).

70312305 is a wasteful number, since it uses less digits than its factorization.

70312305 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 646 (or 639 counting only the distinct ones).

The product of its (nonzero) digits is 630, while the sum is 21.

The square root of 70312305 is about 8385.2432880627. The cubic root of 70312305 is about 412.7405245554.

The spelling of 70312305 in words is "seventy million, three hundred twelve thousand, three hundred five".