63699402 has 32 divisors (see below), whose sum is σ = 137575872. Its totient is φ = 19545984.

The previous prime is 63699371. The next prime is 63699407. The reversal of 63699402 is 20499636.

It is a happy number.

It is a super-2 number, since 2×63699402² = 8115227630315208, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is not an unprimeable number, because it can be changed into a prime (63699407) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 34753 + ... + 36539.

It is an arithmetic number, because the mean of its divisors is an integer number (4299246).

Almost surely, 2^63699402 is an apocalyptic number.

63699402 is an abundant number, since it is smaller than the sum of its proper divisors (73876470).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

63699402 is a wasteful number, since it uses less digits than its factorization.

63699402 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2262.

The product of its (nonzero) digits is 69984, while the sum is 39.

The square root of 63699402 is about 7981.1905126992. The cubic root of 63699402 is about 399.3727711406.

The spelling of 63699402 in words is "sixty-three million, six hundred ninety-nine thousand, four hundred two".