61071407 has 4 divisors (see below), whose sum is σ = 61213536. Its totient is φ = 60929280.

The previous prime is 61071401. The next prime is 61071421. The reversal of 61071407 is 70417016.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-61071407 is a prime.

It is a super-3 number, since 3×61071407³ (a number of 24 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61071401) 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, 70418 + ... + 71279.

It is an arithmetic number, because the mean of its divisors is an integer number (15303384).

Almost surely, 2^61071407 is an apocalyptic number.

61071407 is a deficient number, since it is larger than the sum of its proper divisors (142129).

61071407 is a wasteful number, since it uses less digits than its factorization.

61071407 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 142128.

The product of its (nonzero) digits is 1176, while the sum is 26.

The square root of 61071407 is about 7814.8197036144. The cubic root of 61071407 is about 393.8032613935.

The spelling of 61071407 in words is "sixty-one million, seventy-one thousand, four hundred seven".