61431413 has 4 divisors (see below), whose sum is σ = 64102368. Its totient is φ = 58760460.

The previous prime is 61431373. The next prime is 61431479. The reversal of 61431413 is 31413416.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 61431413 - 2²² = 57237109 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (23), and also a Moran number because the ratio is a prime number: 2670931 = 61431413 / (6 + 1 + 4 + 3 + 1 + 4 + 1 + 3).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61431493) 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, 1335443 + ... + 1335488.

It is an arithmetic number, because the mean of its divisors is an integer number (16025592).

Almost surely, 2^61431413 is an apocalyptic number.

It is an amenable number.

61431413 is a deficient number, since it is larger than the sum of its proper divisors (2670955).

61431413 is a wasteful number, since it uses less digits than its factorization.

61431413 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2670954.

The product of its digits is 864, while the sum is 23.

The square root of 61431413 is about 7837.8194033800. The cubic root of 61431413 is about 394.5755479087.

Adding to 61431413 its reverse (31413416), we get a palindrome (92844829).

The spelling of 61431413 in words is "sixty-one million, four hundred thirty-one thousand, four hundred thirteen".