70632731 has 4 divisors (see below), whose sum is σ = 76066032. Its totient is φ = 65199432.

The previous prime is 70632713. The next prime is 70632743. The reversal of 70632731 is 13723607.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 70632731 - 2¹⁰ = 70631707 is a prime.

It is a super-2 number, since 2×70632731² = 9977965377036722, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 70632694 and 70632703.

It is not an unprimeable number, because it can be changed into a prime (70632761) 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, 2716631 + ... + 2716656.

It is an arithmetic number, because the mean of its divisors is an integer number (19016508).

Almost surely, 2^70632731 is an apocalyptic number.

70632731 is a deficient number, since it is larger than the sum of its proper divisors (5433301).

70632731 is a wasteful number, since it uses less digits than its factorization.

70632731 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5433300.

The product of its (nonzero) digits is 5292, while the sum is 29.

The square root of 70632731 is about 8404.3281111580. The cubic root of 70632731 is about 413.3665524955.

The spelling of 70632731 in words is "seventy million, six hundred thirty-two thousand, seven hundred thirty-one".