9742451990 has 8 divisors (see below), whose sum is σ = 17536413600. Its totient is φ = 3896980792.

The previous prime is 9742451921. The next prime is 9742452001. The reversal of 9742451990 is 991542479.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 487122590 + ... + 487122609.

It is an arithmetic number, because the mean of its divisors is an integer number (2192051700).

Almost surely, 2^9742451990 is an apocalyptic number.

9742451990 is a deficient number, since it is larger than the sum of its proper divisors (7793961610).

9742451990 is a wasteful number, since it uses less digits than its factorization.

9742451990 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 974245206.

The product of its (nonzero) digits is 816480, while the sum is 50.

The square root of 9742451990 is about 98703.8600562308. The cubic root of 9742451990 is about 2135.7779152725. Note that the first 3 decimals are identical.

The spelling of 9742451990 in words is "nine billion, seven hundred forty-two million, four hundred fifty-one thousand, nine hundred ninety".