61514491 has 2 divisors, whose sum is σ = 61514492. Its totient is φ = 61514490.

The previous prime is 61514437. The next prime is 61514549. The reversal of 61514491 is 19441516.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 61514491 - 2¹⁵ = 61481723 is a prime.

It is not a weakly prime, because it can be changed into another prime (61614491) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30757245 + 30757246.

It is an arithmetic number, because the mean of its divisors is an integer number (30757246).

Almost surely, 2^61514491 is an apocalyptic number.

61514491 is a deficient number, since it is larger than the sum of its proper divisors (1).

61514491 is an equidigital number, since it uses as much as digits as its factorization.

61514491 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4320, while the sum is 31.

The square root of 61514491 is about 7843.1174286759. The cubic root of 61514491 is about 394.7533384978.

The spelling of 61514491 in words is "sixty-one million, five hundred fourteen thousand, four hundred ninety-one".