921261337 has 2 divisors, whose sum is σ = 921261338. Its totient is φ = 921261336.

The previous prime is 921261329. The next prime is 921261373. The reversal of 921261337 is 733162129.

Together with next prime (921261373) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 730296576 + 190964761 = 27024^2 + 13819^2 .

It is a cyclic number.

It is not a de Polignac number, because 921261337 - 2³ = 921261329 is a prime.

It is not a weakly prime, because it can be changed into another prime (921261307) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 460630668 + 460630669.

It is an arithmetic number, because the mean of its divisors is an integer number (460630669).

Almost surely, 2^921261337 is an apocalyptic number.

It is an amenable number.

921261337 is a deficient number, since it is larger than the sum of its proper divisors (1).

921261337 is an equidigital number, since it uses as much as digits as its factorization.

921261337 is an evil number, because the sum of its binary digits is even.

The product of its digits is 13608, while the sum is 34.

The square root of 921261337 is about 30352.2871790579. The cubic root of 921261337 is about 973.0331023279.

The spelling of 921261337 in words is "nine hundred twenty-one million, two hundred sixty-one thousand, three hundred thirty-seven".