61893451 has 2 divisors, whose sum is σ = 61893452. Its totient is φ = 61893450.

The previous prime is 61893443. The next prime is 61893457. The reversal of 61893451 is 15439816.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 61893451 - 2³ = 61893443 is a prime.

It is equal to p_3667663 and since 61893451 and 3667663 have the same sum of digits, it is a Honaker prime.

It is a self number, because there is not a number n which added to its sum of digits gives 61893451.

It is not a weakly prime, because it can be changed into another prime (61893457) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30946725 + 30946726.

It is an arithmetic number, because the mean of its divisors is an integer number (30946726).

Almost surely, 2^61893451 is an apocalyptic number.

61893451 is a deficient number, since it is larger than the sum of its proper divisors (1).

61893451 is an equidigital number, since it uses as much as digits as its factorization.

61893451 is an evil number, because the sum of its binary digits is even.

The product of its digits is 25920, while the sum is 37.

The square root of 61893451 is about 7867.2390964048. The cubic root of 61893451 is about 395.5623054854.

The spelling of 61893451 in words is "sixty-one million, eight hundred ninety-three thousand, four hundred fifty-one".