97441992649 has 9 divisors (see below), whose sum is σ = 97791923061. Its totient is φ = 97093313280.

The previous prime is 97441992607. The next prime is 97441992701. The reversal of 97441992649 is 94629914479.

The square root of 97441992649 is 312157.

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

It can be written as a sum of positive squares in 4 ways, for example, as 30946087225 + 66495905424 = 175915^2 + 257868^2 .

It is not a de Polignac number, because 97441992649 - 2¹⁷ = 97441861577 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (97441990649) 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, 168876649 + ... + 168877225.

It is an arithmetic number, because the mean of its divisors is an integer number (10865769229).

Almost surely, 2^97441992649 is an apocalyptic number.

97441992649 is the 312157-th square number.

97441992649 is the 156079-th centered octagonal number.

It is an amenable number.

97441992649 is a deficient number, since it is larger than the sum of its proper divisors (349930412).

97441992649 is an frugal number, since it uses more digits than its factorization.

97441992649 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2236 (or 1118 counting only the distinct ones).

The product of its digits is 35271936, while the sum is 64.

Multiplying 97441992649 by its sum of digits (64), we get a square (6236287529536 = 2497256²).

The spelling of 97441992649 in words is "ninety-seven billion, four hundred forty-one million, nine hundred ninety-two thousand, six hundred forty-nine".