774432121 has 2 divisors, whose sum is σ = 774432122. Its totient is φ = 774432120.

The previous prime is 774432101. The next prime is 774432143. The reversal of 774432121 is 121234477.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 752679225 + 21752896 = 27435^2 + 4664^2 .

It is a cyclic number.

It is not a de Polignac number, because 774432121 - 2²³ = 766043513 is a prime.

It is a super-2 number, since 2×774432121² = 1199490220073117282, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (774432101) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 387216060 + 387216061.

It is an arithmetic number, because the mean of its divisors is an integer number (387216061).

Almost surely, 2^774432121 is an apocalyptic number.

It is an amenable number.

774432121 is a deficient number, since it is larger than the sum of its proper divisors (1).

774432121 is an equidigital number, since it uses as much as digits as its factorization.

774432121 is an evil number, because the sum of its binary digits is even.

The product of its digits is 9408, while the sum is 31.

The square root of 774432121 is about 27828.6205371377. The cubic root of 774432121 is about 918.3208663921.

Adding to 774432121 its reverse (121234477), we get a palindrome (895666598).

The spelling of 774432121 in words is "seven hundred seventy-four million, four hundred thirty-two thousand, one hundred twenty-one".