1949890977 has 12 divisors (see below), whose sum is σ = 2817743760. Its totient is φ = 1299357528.

The previous prime is 1949890967. The next prime is 1949890981. The reversal of 1949890977 is 7790989491.

1949890977 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 1949890977 - 2⁴ = 1949890961 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1949890967) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 25263 + ... + 67364.

It is an arithmetic number, because the mean of its divisors is an integer number (234811980).

Almost surely, 2^1949890977 is an apocalyptic number.

It is an amenable number.

1949890977 is a deficient number, since it is larger than the sum of its proper divisors (867852783).

1949890977 is a wasteful number, since it uses less digits than its factorization.

1949890977 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 94972 (or 94969 counting only the distinct ones).

The product of its (nonzero) digits is 10287648, while the sum is 63.

The square root of 1949890977 is about 44157.5698719936. The cubic root of 1949890977 is about 1249.3096939455.

The spelling of 1949890977 in words is "one billion, nine hundred forty-nine million, eight hundred ninety thousand, nine hundred seventy-seven".