61101913 has 2 divisors, whose sum is σ = 61101914. Its totient is φ = 61101912.

The previous prime is 61101883. The next prime is 61101917. The reversal of 61101913 is 31910116.

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., 59105344 + 1996569 = 7688^2 + 1413^2 .

It is a cyclic number.

It is not a de Polignac number, because 61101913 - 2²¹ = 59004761 is a prime.

It is not a weakly prime, because it can be changed into another prime (61101917) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30550956 + 30550957.

It is an arithmetic number, because the mean of its divisors is an integer number (30550957).

Almost surely, 2^61101913 is an apocalyptic number.

It is an amenable number.

61101913 is a deficient number, since it is larger than the sum of its proper divisors (1).

61101913 is an equidigital number, since it uses as much as digits as its factorization.

61101913 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 162, while the sum is 22.

The square root of 61101913 is about 7816.7712644032. The cubic root of 61101913 is about 393.8688205106.

The spelling of 61101913 in words is "sixty-one million, one hundred one thousand, nine hundred thirteen".