70721433 has 12 divisors (see below), whose sum is σ = 104645268. Its totient is φ = 45997440.

The previous prime is 70721429. The next prime is 70721449. The reversal of 70721433 is 33412707.

It can be written as a sum of positive squares in 2 ways, for example, as 25522704 + 45198729 = 5052^2 + 6723^2 .

It is not a de Polignac number, because 70721433 - 2² = 70721429 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 70721397 and 70721406.

It is not an unprimeable number, because it can be changed into a prime (70722433) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 95460 + ... + 96197.

It is an arithmetic number, because the mean of its divisors is an integer number (8720439).

Almost surely, 2^70721433 is an apocalyptic number.

It is an amenable number.

70721433 is a deficient number, since it is larger than the sum of its proper divisors (33923835).

70721433 is a wasteful number, since it uses less digits than its factorization.

70721433 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 191704 (or 191701 counting only the distinct ones).

The product of its (nonzero) digits is 3528, while the sum is 27.

The square root of 70721433 is about 8409.6036172937. The cubic root of 70721433 is about 413.5395181131.

The spelling of 70721433 in words is "seventy million, seven hundred twenty-one thousand, four hundred thirty-three".