755653991 has 2 divisors, whose sum is σ = 755653992. Its totient is φ = 755653990.

The previous prime is 755653949. The next prime is 755653993. The reversal of 755653991 is 199356557.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 755653991 - 2¹⁰ = 755652967 is a prime.

It is a super-2 number, since 2×755653991² = 1142025908228456162, which contains 22 as substring.

Together with 755653993, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (755653993) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 377826995 + 377826996.

It is an arithmetic number, because the mean of its divisors is an integer number (377826996).

Almost surely, 2^755653991 is an apocalyptic number.

755653991 is a deficient number, since it is larger than the sum of its proper divisors (1).

755653991 is an equidigital number, since it uses as much as digits as its factorization.

755653991 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1275750, while the sum is 50.

The square root of 755653991 is about 27489.1613367887. The cubic root of 755653991 is about 910.8376905774.

The spelling of 755653991 in words is "seven hundred fifty-five million, six hundred fifty-three thousand, nine hundred ninety-one".