61672905 has 24 divisors (see below), whose sum is σ = 122171712. Its totient is φ = 28193184.

The previous prime is 61672873. The next prime is 61672909. The reversal of 61672905 is 50927616.

It is not a de Polignac number, because 61672905 - 2⁵ = 61672873 is a prime.

It is a super-2 number, since 2×61672905² = 7607094422278050, which contains 22 as substring.

It is an alternating number because its digits alternate between even and odd.

It is a self number, because there is not a number n which added to its sum of digits gives 61672905.

It is not an unprimeable number, because it can be changed into a prime (61672909) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 97579 + ... + 98208.

It is an arithmetic number, because the mean of its divisors is an integer number (5090488).

Almost surely, 2^61672905 is an apocalyptic number.

It is an amenable number.

61672905 is a deficient number, since it is larger than the sum of its proper divisors (60498807).

61672905 is a wasteful number, since it uses less digits than its factorization.

61672905 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 195805 (or 195802 counting only the distinct ones).

The product of its (nonzero) digits is 22680, while the sum is 36.

The square root of 61672905 is about 7853.2098533020. The cubic root of 61672905 is about 395.0919083253.

The spelling of 61672905 in words is "sixty-one million, six hundred seventy-two thousand, nine hundred five".