61077091 has 2 divisors, whose sum is σ = 61077092. Its totient is φ = 61077090.

The previous prime is 61077089. The next prime is 61077097. The reversal of 61077091 is 19077016.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 61077091 - 2¹ = 61077089 is a prime.

It is a super-2 number, since 2×61077091² = 7460822090044562, which contains 22 as substring.

Together with 61077089, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (61077097) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30538545 + 30538546.

It is an arithmetic number, because the mean of its divisors is an integer number (30538546).

Almost surely, 2^61077091 is an apocalyptic number.

61077091 is a deficient number, since it is larger than the sum of its proper divisors (1).

61077091 is an equidigital number, since it uses as much as digits as its factorization.

61077091 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2646, while the sum is 31.

The square root of 61077091 is about 7815.1833631720. The cubic root of 61077091 is about 393.8154782852.

The spelling of 61077091 in words is "sixty-one million, seventy-seven thousand, ninety-one".