70642237 has 4 divisors (see below), whose sum is σ = 71436060. Its totient is φ = 69848416.

The previous prime is 70642217. The next prime is 70642267. The reversal of 70642237 is 73224607.

It is a happy number.

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

It can be written as a sum of positive squares in 2 ways, for example, as 22838841 + 47803396 = 4779^2 + 6914^2 .

It is a cyclic number.

It is not a de Polignac number, because 70642237 - 2¹¹ = 70640189 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 70642199 and 70642208.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (70642217) 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, 396778 + ... + 396955.

It is an arithmetic number, because the mean of its divisors is an integer number (17859015).

Almost surely, 2^70642237 is an apocalyptic number.

It is an amenable number.

70642237 is a deficient number, since it is larger than the sum of its proper divisors (793823).

70642237 is an equidigital number, since it uses as much as digits as its factorization.

70642237 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 793822.

The product of its (nonzero) digits is 14112, while the sum is 31.

The square root of 70642237 is about 8404.8936340682. The cubic root of 70642237 is about 413.3850957691.

The spelling of 70642237 in words is "seventy million, six hundred forty-two thousand, two hundred thirty-seven".