61458491 has 2 divisors, whose sum is σ = 61458492. Its totient is φ = 61458490.

The previous prime is 61458487. The next prime is 61458493. The reversal of 61458491 is 19485416.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 61458491 - 2² = 61458487 is a prime.

It is a super-2 number, since 2×61458491² = 7554292231994162, which contains 22 as substring.

Together with 61458493, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (61458493) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30729245 + 30729246.

It is an arithmetic number, because the mean of its divisors is an integer number (30729246).

Almost surely, 2^61458491 is an apocalyptic number.

61458491 is a deficient number, since it is larger than the sum of its proper divisors (1).

61458491 is an equidigital number, since it uses as much as digits as its factorization.

61458491 is an evil number, because the sum of its binary digits is even.

The product of its digits is 34560, while the sum is 38.

The square root of 61458491 is about 7839.5466067879. The cubic root of 61458491 is about 394.6335136232.

The spelling of 61458491 in words is "sixty-one million, four hundred fifty-eight thousand, four hundred ninety-one".