611872901 has 2 divisors, whose sum is σ = 611872902. Its totient is φ = 611872900.

The previous prime is 611872879. The next prime is 611872909. The reversal of 611872901 is 109278116.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 546343876 + 65529025 = 23374^2 + 8095^2 .

It is a cyclic number.

It is not a de Polignac number, because 611872901 - 2²⁶ = 544764037 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (611872909) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 305936450 + 305936451.

It is an arithmetic number, because the mean of its divisors is an integer number (305936451).

Almost surely, 2^611872901 is an apocalyptic number.

It is an amenable number.

611872901 is a deficient number, since it is larger than the sum of its proper divisors (1).

611872901 is an equidigital number, since it uses as much as digits as its factorization.

611872901 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6048, while the sum is 35.

The square root of 611872901 is about 24736.0647840355. The cubic root of 611872901 is about 848.9596966258.

The spelling of 611872901 in words is "six hundred eleven million, eight hundred seventy-two thousand, nine hundred one".