9998972402 has 4 divisors (see below), whose sum is σ = 14998458606. Its totient is φ = 4999486200.

The previous prime is 9998972381. The next prime is 9998972429. The reversal of 9998972402 is 2042798999.

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., 9995800441 + 3171961 = 99979^2 + 1781^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2499743099 + ... + 2499743102.

Almost surely, 2^9998972402 is an apocalyptic number.

9998972402 is a deficient number, since it is larger than the sum of its proper divisors (4999486204).

9998972402 is a wasteful number, since it uses less digits than its factorization.

9998972402 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4999486203.

The product of its (nonzero) digits is 5878656, while the sum is 59.

The square root of 9998972402 is about 99994.8618779985. The cubic root of 9998972402 is about 2154.3608910780.

The spelling of 9998972402 in words is "nine billion, nine hundred ninety-eight million, nine hundred seventy-two thousand, four hundred two".