611649253 has 2 divisors, whose sum is σ = 611649254. Its totient is φ = 611649252.

The previous prime is 611649223. The next prime is 611649293. The reversal of 611649253 is 352946116.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 611177284 + 471969 = 24722^2 + 687^2 .

It is a cyclic number.

It is not a de Polignac number, because 611649253 - 2⁵ = 611649221 is a prime.

It is a super-2 number, since 2×611649253² = 748229617390916018, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (611649223) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 305824626 + 305824627.

It is an arithmetic number, because the mean of its divisors is an integer number (305824627).

Almost surely, 2^611649253 is an apocalyptic number.

It is an amenable number.

611649253 is a deficient number, since it is larger than the sum of its proper divisors (1).

611649253 is an equidigital number, since it uses as much as digits as its factorization.

611649253 is an evil number, because the sum of its binary digits is even.

The product of its digits is 38880, while the sum is 37.

The square root of 611649253 is about 24731.5436841294. The cubic root of 611649253 is about 848.8562485210.

The spelling of 611649253 in words is "six hundred eleven million, six hundred forty-nine thousand, two hundred fifty-three".