61917471 has 48 divisors (see below), whose sum is σ = 113937408. Its totient is φ = 31464000.

The previous prime is 61917469. The next prime is 61917487. The reversal of 61917471 is 17471916.

It is not a de Polignac number, because 61917471 - 2¹ = 61917469 is a prime.

It is a super-3 number, since 3×61917471³ (a number of 24 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61917431) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 31621 + ... + 33521.

It is an arithmetic number, because the mean of its divisors is an integer number (2373696).

Almost surely, 2^61917471 is an apocalyptic number.

61917471 is a deficient number, since it is larger than the sum of its proper divisors (52019937).

61917471 is a wasteful number, since it uses less digits than its factorization.

61917471 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1972 (or 1969 counting only the distinct ones).

The product of its digits is 10584, while the sum is 36.

The square root of 61917471 is about 7868.7655321531. The cubic root of 61917471 is about 395.6134696369.

The spelling of 61917471 in words is "sixty-one million, nine hundred seventeen thousand, four hundred seventy-one".