61314391 has 2 divisors, whose sum is σ = 61314392. Its totient is φ = 61314390.

The previous prime is 61314377. The next prime is 61314401. The reversal of 61314391 is 19341316.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 61314391 - 2¹⁷ = 61183319 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (61314361) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30657195 + 30657196.

It is an arithmetic number, because the mean of its divisors is an integer number (30657196).

Almost surely, 2^61314391 is an apocalyptic number.

61314391 is a deficient number, since it is larger than the sum of its proper divisors (1).

61314391 is an equidigital number, since it uses as much as digits as its factorization.

61314391 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1944, while the sum is 28.

The square root of 61314391 is about 7830.3506307189. The cubic root of 61314391 is about 394.3248435439.

The spelling of 61314391 in words is "sixty-one million, three hundred fourteen thousand, three hundred ninety-one".