990409719 has 16 divisors (see below), whose sum is σ = 1422764000. Its totient is φ = 609209856.

The previous prime is 990409697. The next prime is 990409727. The reversal of 990409719 is 917904099.

It is not a de Polignac number, because 990409719 - 2⁷ = 990409591 is a prime.

It is a super-2 number, since 2×990409719² = 1961822822979317922, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (990409759) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 114747 + ... + 123075.

It is an arithmetic number, because the mean of its divisors is an integer number (88922750).

Almost surely, 2^990409719 is an apocalyptic number.

990409719 is a deficient number, since it is larger than the sum of its proper divisors (432354281).

990409719 is a wasteful number, since it uses less digits than its factorization.

990409719 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11394.

The product of its (nonzero) digits is 183708, while the sum is 48.

The square root of 990409719 is about 31470.7756339115. The cubic root of 990409719 is about 996.7929655918.

The spelling of 990409719 in words is "nine hundred ninety million, four hundred nine thousand, seven hundred nineteen".