61892491 has 4 divisors (see below), whose sum is σ = 62907184. Its totient is φ = 60877800.

The previous prime is 61892459. The next prime is 61892507. The reversal of 61892491 is 19429816.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 61892491 - 2⁵ = 61892459 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (61892431) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 507255 + ... + 507376.

It is an arithmetic number, because the mean of its divisors is an integer number (15726796).

Almost surely, 2^61892491 is an apocalyptic number.

61892491 is a gapful number since it is divisible by the number (61) formed by its first and last digit.

61892491 is a deficient number, since it is larger than the sum of its proper divisors (1014693).

61892491 is a wasteful number, since it uses less digits than its factorization.

61892491 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1014692.

The product of its digits is 31104, while the sum is 40.

The square root of 61892491 is about 7867.1780836587. The cubic root of 61892491 is about 395.5602603483.

The spelling of 61892491 in words is "sixty-one million, eight hundred ninety-two thousand, four hundred ninety-one".