740734921 has 2 divisors, whose sum is σ = 740734922. Its totient is φ = 740734920.

The previous prime is 740734919. The next prime is 740734927. The reversal of 740734921 is 129437047.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 696379321 + 44355600 = 26389^2 + 6660^2 .

It is a cyclic number.

It is not a de Polignac number, because 740734921 - 2¹ = 740734919 is a prime.

Together with 740734919, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (740734927) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 370367460 + 370367461.

It is an arithmetic number, because the mean of its divisors is an integer number (370367461).

Almost surely, 2^740734921 is an apocalyptic number.

It is an amenable number.

740734921 is a deficient number, since it is larger than the sum of its proper divisors (1).

740734921 is an equidigital number, since it uses as much as digits as its factorization.

740734921 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 42336, while the sum is 37.

The square root of 740734921 is about 27216.4457819165. The cubic root of 740734921 is about 904.8035026111.

The spelling of 740734921 in words is "seven hundred forty million, seven hundred thirty-four thousand, nine hundred twenty-one".