87970738 has 4 divisors (see below), whose sum is σ = 131956110. Its totient is φ = 43985368.

The previous prime is 87970709. The next prime is 87970747. The reversal of 87970738 is 83707978.

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 only one way, i.e., 86731969 + 1238769 = 9313^2 + 1113^2 .

It is a Smith number, since the sum of its digits (49) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a junction number, because it is equal to n+sod(n) for n = 87970691 and 87970700.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21992683 + ... + 21992686.

Almost surely, 2^87970738 is an apocalyptic number.

87970738 is a deficient number, since it is larger than the sum of its proper divisors (43985372).

87970738 is a wasteful number, since it uses less digits than its factorization.

87970738 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43985371.

The product of its (nonzero) digits is 592704, while the sum is 49.

The square root of 87970738 is about 9379.2717201284. The cubic root of 87970738 is about 444.7467110532.

It can be divided in two parts, 879 and 70738, that added together give a palindrome (71617).

The spelling of 87970738 in words is "eighty-seven million, nine hundred seventy thousand, seven hundred thirty-eight".