7721391034 has 16 divisors (see below), whose sum is σ = 13262997888. Its totient is φ = 3302585712.

The previous prime is 7721391023. The next prime is 7721391059. The reversal of 7721391034 is 4301931277.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 7721390984 and 7721391002.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 541197 + ... + 555280.

It is an arithmetic number, because the mean of its divisors is an integer number (828937368).

Almost surely, 2^7721391034 is an apocalyptic number.

7721391034 is a deficient number, since it is larger than the sum of its proper divisors (5541606854).

7721391034 is a wasteful number, since it uses less digits than its factorization.

7721391034 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1096989.

The product of its (nonzero) digits is 31752, while the sum is 37.

The square root of 7721391034 is about 87871.4460675366. The cubic root of 7721391034 is about 1976.5077230522.

The spelling of 7721391034 in words is "seven billion, seven hundred twenty-one million, three hundred ninety-one thousand, thirty-four".