63970402 has 4 divisors (see below), whose sum is σ = 95955606. Its totient is φ = 31985200.

The previous prime is 63970399. The next prime is 63970409. The reversal of 63970402 is 20407936.

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., 39576681 + 24393721 = 6291^2 + 4939^2 .

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (63970409) 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 as a sum of consecutive naturals, namely, 15992599 + ... + 15992602.

Almost surely, 2^63970402 is an apocalyptic number.

63970402 is a deficient number, since it is larger than the sum of its proper divisors (31985204).

63970402 is a wasteful number, since it uses less digits than its factorization.

63970402 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31985203.

The product of its (nonzero) digits is 9072, while the sum is 31.

The square root of 63970402 is about 7998.1499110732. The cubic root of 63970402 is about 399.9383279919.

The spelling of 63970402 in words is "sixty-three million, nine hundred seventy thousand, four hundred two".