774155089 has 2 divisors, whose sum is σ = 774155090. Its totient is φ = 774155088.

The previous prime is 774155059. The next prime is 774155113. The reversal of 774155089 is 980551477.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 584817489 + 189337600 = 24183^2 + 13760^2 .

It is a cyclic number.

It is not a de Polignac number, because 774155089 - 2¹⁹ = 773630801 is a prime.

It is a super-2 number, since 2×774155089² = 1198632203649195842, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (774155009) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 387077544 + 387077545.

It is an arithmetic number, because the mean of its divisors is an integer number (387077545).

Almost surely, 2^774155089 is an apocalyptic number.

It is an amenable number.

774155089 is a deficient number, since it is larger than the sum of its proper divisors (1).

774155089 is an equidigital number, since it uses as much as digits as its factorization.

774155089 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 352800, while the sum is 46.

The square root of 774155089 is about 27823.6426263708. The cubic root of 774155089 is about 918.2113519058.

The spelling of 774155089 in words is "seven hundred seventy-four million, one hundred fifty-five thousand, eighty-nine".