94132989721 has 9 divisors (see below), whose sum is σ = 95143517631. Its totient is φ = 93133092672.

The previous prime is 94132989689. The next prime is 94132989737. The reversal of 94132989721 is 12798923149.

It is a happy number.

The square root of 94132989721 is 306811.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 42269304025 + 51863685696 = 205595^2 + 227736^2 .

It is not a de Polignac number, because 94132989721 - 2⁵ = 94132989689 is a prime.

It is a super-2 number, since 2×94132989721² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (94132989751) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 29759086 + ... + 29762248.

It is an arithmetic number, because the mean of its divisors is an integer number (10571501959).

Almost surely, 2^94132989721 is an apocalyptic number.

94132989721 is the 306811-st square number.

94132989721 is the 153406-th centered octagonal number.

It is an amenable number.

94132989721 is a deficient number, since it is larger than the sum of its proper divisors (1010527910).

94132989721 is an frugal number, since it uses more digits than its factorization.

94132989721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6520 (or 3260 counting only the distinct ones).

The product of its digits is 1959552, while the sum is 55.

The spelling of 94132989721 in words is "ninety-four billion, one hundred thirty-two million, nine hundred eighty-nine thousand, seven hundred twenty-one".