1651951949 has 8 divisors (see below), whose sum is σ = 1656148512. Its totient is φ = 1647762480.

The previous prime is 1651951943. The next prime is 1651951997. The reversal of 1651951949 is 9491591561.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1651951949 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1651951897 and 1651951906.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1651951943) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1361267 + ... + 1362479.

It is an arithmetic number, because the mean of its divisors is an integer number (207018564).

Almost surely, 2^1651951949 is an apocalyptic number.

It is an amenable number.

1651951949 is a deficient number, since it is larger than the sum of its proper divisors (4196563).

1651951949 is a wasteful number, since it uses less digits than its factorization.

1651951949 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3547.

The product of its digits is 437400, while the sum is 50.

The square root of 1651951949 is about 40644.2117527207. The cubic root of 1651951949 is about 1182.1315367963.

The spelling of 1651951949 in words is "one billion, six hundred fifty-one million, nine hundred fifty-one thousand, nine hundred forty-nine".